Class 10 Exam > Class 10 Notes > Magnetic Effect of Electric Current notes+ Sample Paper:-
Magnetic Effect of Electric Current notes+ Sample Paper:- - Class 10 PDF Download
| Download, print and study this document offline |
Please wait while the PDF view is loading
Page 1
64
MAGNETIC EFFECTS OF ELECTRIC CURRENT
KEY CONCEPTS & GIST OF THE LESSON
? Magnet: (i) is an object that attracts objects made of iron, cobalt & nickel.
(ii) Comes to rest in North-South direction, when suspended freely.
? Magnets are used: (i) In radio & stereo speakers, (ii) In refrigerator doors, (iii) on audio &
video cassettes players, (iv) On hard discs & floppies of computers & (v) in children‘s toys.
? Magnetic field: The area around a magnet where a magnetic force is experienced is called a
magnetic field. It is a quantity that has both direction & magnitude.
? Magnetic field lines: Magnetic field is represented by field lines. They are lines drawn in a
Magnetic field along which a North magnetic pole moves. Magnetic field lines are called as
Magnetic lines of force.
Refer to figure 13.3 & 13.4 page no. 225 of N.C.E.R.T Text book)
? Properties of Magnetic field lines:
(i) They do not intersect each other.
(ii) It is taken by convention that magnetic field lines emerge from
North pole and merge at the South pole. Inside the magnet, their
direction is from South pole to North pole. Therefore magnetic field
lines are closed curves.
? Magnetic field lines due to a current through a straight conductor (wire)- consist of series of
concentric circles whose direction is given by the Right hand thumb rule.
? Right hand thumb rule: If a current carrying straight conductor is held in your right hand such
that the thumb points towards the direction of current, then the wrapped fingers show the
direction of magnetic field lines.
(Refer to figure 13.7, page no. 228 of N.C.E.R.T Text book)
? Magnetic field lines due to a current through a circular loop
(Refer to figure 13.8, page no. 228 of N.C.E.R.T Text book)
? The strength of the magnetic field at he centre of the loop(coil)depends on:
(i) The radius of the coil- The strength of the magnetic field is inversely
proportional to the radius of the coil. If the radius increases, the
magnetic strength at the centre decreases.
(ii) The number of turns in the coil: As the number of turns in the coil
increase, the magnetic strength at the centre increases, because the
current in each circular turn is having the same direction, thus the
field due to each turn adds up.
(iii) The strength of the current flowing in the coil: as the strength of the
current increases, the strength of thee magnetic fields also increases.
? Solenoid: (Refer to figure 13.10, page no. 229 of N.C.E.R.T Text book)
? (i) A coil of many turns of insulated copper wire wrapped in the shape of a cylinder is called
a Solenoid.
(ii) Magnetic field produced by a Solenoid is similar to a bar magnet.
(iii) The strength of magnetic field is proportional to the number of turns & magnitude of
current.
www.ncerthelp.com
Visit www.ncerthelp.com for Ncert Solutions in Text and Video , CBSE Sample papers, Exam tips,
NCERT BOOKS, Motivational Videos, Notes for All Classes and Many More...
Page 2
64
MAGNETIC EFFECTS OF ELECTRIC CURRENT
KEY CONCEPTS & GIST OF THE LESSON
? Magnet: (i) is an object that attracts objects made of iron, cobalt & nickel.
(ii) Comes to rest in North-South direction, when suspended freely.
? Magnets are used: (i) In radio & stereo speakers, (ii) In refrigerator doors, (iii) on audio &
video cassettes players, (iv) On hard discs & floppies of computers & (v) in children‘s toys.
? Magnetic field: The area around a magnet where a magnetic force is experienced is called a
magnetic field. It is a quantity that has both direction & magnitude.
? Magnetic field lines: Magnetic field is represented by field lines. They are lines drawn in a
Magnetic field along which a North magnetic pole moves. Magnetic field lines are called as
Magnetic lines of force.
Refer to figure 13.3 & 13.4 page no. 225 of N.C.E.R.T Text book)
? Properties of Magnetic field lines:
(i) They do not intersect each other.
(ii) It is taken by convention that magnetic field lines emerge from
North pole and merge at the South pole. Inside the magnet, their
direction is from South pole to North pole. Therefore magnetic field
lines are closed curves.
? Magnetic field lines due to a current through a straight conductor (wire)- consist of series of
concentric circles whose direction is given by the Right hand thumb rule.
? Right hand thumb rule: If a current carrying straight conductor is held in your right hand such
that the thumb points towards the direction of current, then the wrapped fingers show the
direction of magnetic field lines.
(Refer to figure 13.7, page no. 228 of N.C.E.R.T Text book)
? Magnetic field lines due to a current through a circular loop
(Refer to figure 13.8, page no. 228 of N.C.E.R.T Text book)
? The strength of the magnetic field at he centre of the loop(coil)depends on:
(i) The radius of the coil- The strength of the magnetic field is inversely
proportional to the radius of the coil. If the radius increases, the
magnetic strength at the centre decreases.
(ii) The number of turns in the coil: As the number of turns in the coil
increase, the magnetic strength at the centre increases, because the
current in each circular turn is having the same direction, thus the
field due to each turn adds up.
(iii) The strength of the current flowing in the coil: as the strength of the
current increases, the strength of thee magnetic fields also increases.
? Solenoid: (Refer to figure 13.10, page no. 229 of N.C.E.R.T Text book)
? (i) A coil of many turns of insulated copper wire wrapped in the shape of a cylinder is called
a Solenoid.
(ii) Magnetic field produced by a Solenoid is similar to a bar magnet.
(iii) The strength of magnetic field is proportional to the number of turns & magnitude of
current.
www.ncerthelp.com
Visit www.ncerthelp.com for Ncert Solutions in Text and Video , CBSE Sample papers, Exam tips,
NCERT BOOKS, Motivational Videos, Notes for All Classes and Many More...
65
? Electromagnet: An electromagnet consists of a long coil of insulated copper wire wrapped on
a soft iron core.
(Refer to figure 13.11, page no. 229 of N.C.E.R.T Text book)
? Fleming‘s Left hand rule: Stretch the thumb, forefinger and middle finger of left hand such
that they are mutually perpendicular. Forefinger points in the direction of magnetic field and
centre finger in the direction of current, then the thumb gives the direction of force acting on
the conductor.
(Refer to figure13.13, page no. 231 13.13 of N.C.E.R.T Text book)
? Electric motor: A device that converts electric energy to mechanical energy.
(Refer to figure 13.15, page no. 232 of N.C.E.R.T Text book)
? Principle of Electric motor: When a rectangular coil is placed in a magnetic field and a
current is passed through it, force acts on the coil, which rotates it continuously. With the
rotation of the coil, the shaft attached to it also rotates.
? Electromagnetic induction: Electricity production as a result of magnetism (induced current)
is called Electromagnetic induction.
? Fleming‘s Right hand rule: gives the direction of induced current.
Stretch the thumb, forefinger and middle finger of right hand such that they are mutually
perpendicular. Forefinger points in the direction of magnetic field and centre finger in the
direction of induced current, then the thumb gives the direction of motion of the conductor.
? Electric generator: A devise that converts mechanical energy to electric energy.
(Refer to figure 13.19, page no. 236 of N.C.E.R.T Text book)
Electric generator is of two types- (i) A.C generator (ii) D. C generator
? Principle of Electric generator: Electromagnetic induction
? Domestic electric circuits: (Refer to figure 13.20, page 238 of N.C.E.R.T Text book)
? We receive electric supply through mains supported through the poles or cables. In our houses
we receive AC electric power of 220V with a frequency of 50Hz.
The 3 wires are as follows- (i) Live wire- (Red insulated, Positive)
(ii) Neutral wire- (Black insulated, Negative)
(iii) Earth wire- (Green insulated) for safety measure to ensure
that any leakage of current to a metallic body does not give
any serious shock to a user.
? Short circuit: is caused by touching of live wires and neutral wire
? Fuse: is a protective device used for protecting the circuits from short circuiting and over
loading
? Important diagrams-
1. Magnetic field lines around a bar magnet.
2. Right hand thumb rule
3. Magnetic field lines through and around a current carrying solenoid.
4. An electromagnet.
5. A simple electric motor
6. Electric generator
www.ncerthelp.com
Visit www.ncerthelp.com for Ncert Solutions in Text and Video , CBSE Sample papers, Exam tips,
NCERT BOOKS, Motivational Videos, Notes for All Classes and Many More...
Page 3
64
MAGNETIC EFFECTS OF ELECTRIC CURRENT
KEY CONCEPTS & GIST OF THE LESSON
? Magnet: (i) is an object that attracts objects made of iron, cobalt & nickel.
(ii) Comes to rest in North-South direction, when suspended freely.
? Magnets are used: (i) In radio & stereo speakers, (ii) In refrigerator doors, (iii) on audio &
video cassettes players, (iv) On hard discs & floppies of computers & (v) in children‘s toys.
? Magnetic field: The area around a magnet where a magnetic force is experienced is called a
magnetic field. It is a quantity that has both direction & magnitude.
? Magnetic field lines: Magnetic field is represented by field lines. They are lines drawn in a
Magnetic field along which a North magnetic pole moves. Magnetic field lines are called as
Magnetic lines of force.
Refer to figure 13.3 & 13.4 page no. 225 of N.C.E.R.T Text book)
? Properties of Magnetic field lines:
(i) They do not intersect each other.
(ii) It is taken by convention that magnetic field lines emerge from
North pole and merge at the South pole. Inside the magnet, their
direction is from South pole to North pole. Therefore magnetic field
lines are closed curves.
? Magnetic field lines due to a current through a straight conductor (wire)- consist of series of
concentric circles whose direction is given by the Right hand thumb rule.
? Right hand thumb rule: If a current carrying straight conductor is held in your right hand such
that the thumb points towards the direction of current, then the wrapped fingers show the
direction of magnetic field lines.
(Refer to figure 13.7, page no. 228 of N.C.E.R.T Text book)
? Magnetic field lines due to a current through a circular loop
(Refer to figure 13.8, page no. 228 of N.C.E.R.T Text book)
? The strength of the magnetic field at he centre of the loop(coil)depends on:
(i) The radius of the coil- The strength of the magnetic field is inversely
proportional to the radius of the coil. If the radius increases, the
magnetic strength at the centre decreases.
(ii) The number of turns in the coil: As the number of turns in the coil
increase, the magnetic strength at the centre increases, because the
current in each circular turn is having the same direction, thus the
field due to each turn adds up.
(iii) The strength of the current flowing in the coil: as the strength of the
current increases, the strength of thee magnetic fields also increases.
? Solenoid: (Refer to figure 13.10, page no. 229 of N.C.E.R.T Text book)
? (i) A coil of many turns of insulated copper wire wrapped in the shape of a cylinder is called
a Solenoid.
(ii) Magnetic field produced by a Solenoid is similar to a bar magnet.
(iii) The strength of magnetic field is proportional to the number of turns & magnitude of
current.
www.ncerthelp.com
Visit www.ncerthelp.com for Ncert Solutions in Text and Video , CBSE Sample papers, Exam tips,
NCERT BOOKS, Motivational Videos, Notes for All Classes and Many More...
65
? Electromagnet: An electromagnet consists of a long coil of insulated copper wire wrapped on
a soft iron core.
(Refer to figure 13.11, page no. 229 of N.C.E.R.T Text book)
? Fleming‘s Left hand rule: Stretch the thumb, forefinger and middle finger of left hand such
that they are mutually perpendicular. Forefinger points in the direction of magnetic field and
centre finger in the direction of current, then the thumb gives the direction of force acting on
the conductor.
(Refer to figure13.13, page no. 231 13.13 of N.C.E.R.T Text book)
? Electric motor: A device that converts electric energy to mechanical energy.
(Refer to figure 13.15, page no. 232 of N.C.E.R.T Text book)
? Principle of Electric motor: When a rectangular coil is placed in a magnetic field and a
current is passed through it, force acts on the coil, which rotates it continuously. With the
rotation of the coil, the shaft attached to it also rotates.
? Electromagnetic induction: Electricity production as a result of magnetism (induced current)
is called Electromagnetic induction.
? Fleming‘s Right hand rule: gives the direction of induced current.
Stretch the thumb, forefinger and middle finger of right hand such that they are mutually
perpendicular. Forefinger points in the direction of magnetic field and centre finger in the
direction of induced current, then the thumb gives the direction of motion of the conductor.
? Electric generator: A devise that converts mechanical energy to electric energy.
(Refer to figure 13.19, page no. 236 of N.C.E.R.T Text book)
Electric generator is of two types- (i) A.C generator (ii) D. C generator
? Principle of Electric generator: Electromagnetic induction
? Domestic electric circuits: (Refer to figure 13.20, page 238 of N.C.E.R.T Text book)
? We receive electric supply through mains supported through the poles or cables. In our houses
we receive AC electric power of 220V with a frequency of 50Hz.
The 3 wires are as follows- (i) Live wire- (Red insulated, Positive)
(ii) Neutral wire- (Black insulated, Negative)
(iii) Earth wire- (Green insulated) for safety measure to ensure
that any leakage of current to a metallic body does not give
any serious shock to a user.
? Short circuit: is caused by touching of live wires and neutral wire
? Fuse: is a protective device used for protecting the circuits from short circuiting and over
loading
? Important diagrams-
1. Magnetic field lines around a bar magnet.
2. Right hand thumb rule
3. Magnetic field lines through and around a current carrying solenoid.
4. An electromagnet.
5. A simple electric motor
6. Electric generator
www.ncerthelp.com
Visit www.ncerthelp.com for Ncert Solutions in Text and Video , CBSE Sample papers, Exam tips,
NCERT BOOKS, Motivational Videos, Notes for All Classes and Many More...
66
? Important activities-
1. Magnetic field lines around a bar magnet
2. Direction of electric current in a simple electric circuit.
3. Direction of Magnetic field lines depends on the direction of electric current.
MIND MAP
FORMATIVE ASSESSMENT I
Q. PAPER
MARKS-30 TIME- 70 MINUTES
Instructions:
? Questions : 1 to 5 – 1 Mark each
? Questions : 6 to 9 – 2 Marks each
? Questions : 10 to 13 – 3 Marks each
? Question 14 – 5 Marks
1. State two uses of electromagnet.
2. An electron moving along X – axis in a magnetic field along Y – axis. In which direction
will the electron deflected.
MAGNETIC
EFFECT OF
ELECTRIC
CURRENT
Safety measure
Fuse Earth
wire
Magnet and its
properties
Magnetic field lines
& properties.
Right hand thumb
rule
Solenoid
Electro magnet
Fleming left hand
rule
Electric motor
Fleming right hand rule.
Electromagnetic induction.
Generator
Domestic
electric circuits
www.ncerthelp.com
Visit www.ncerthelp.com for Ncert Solutions in Text and Video , CBSE Sample papers, Exam tips,
NCERT BOOKS, Motivational Videos, Notes for All Classes and Many More...
Page 4
64
MAGNETIC EFFECTS OF ELECTRIC CURRENT
KEY CONCEPTS & GIST OF THE LESSON
? Magnet: (i) is an object that attracts objects made of iron, cobalt & nickel.
(ii) Comes to rest in North-South direction, when suspended freely.
? Magnets are used: (i) In radio & stereo speakers, (ii) In refrigerator doors, (iii) on audio &
video cassettes players, (iv) On hard discs & floppies of computers & (v) in children‘s toys.
? Magnetic field: The area around a magnet where a magnetic force is experienced is called a
magnetic field. It is a quantity that has both direction & magnitude.
? Magnetic field lines: Magnetic field is represented by field lines. They are lines drawn in a
Magnetic field along which a North magnetic pole moves. Magnetic field lines are called as
Magnetic lines of force.
Refer to figure 13.3 & 13.4 page no. 225 of N.C.E.R.T Text book)
? Properties of Magnetic field lines:
(i) They do not intersect each other.
(ii) It is taken by convention that magnetic field lines emerge from
North pole and merge at the South pole. Inside the magnet, their
direction is from South pole to North pole. Therefore magnetic field
lines are closed curves.
? Magnetic field lines due to a current through a straight conductor (wire)- consist of series of
concentric circles whose direction is given by the Right hand thumb rule.
? Right hand thumb rule: If a current carrying straight conductor is held in your right hand such
that the thumb points towards the direction of current, then the wrapped fingers show the
direction of magnetic field lines.
(Refer to figure 13.7, page no. 228 of N.C.E.R.T Text book)
? Magnetic field lines due to a current through a circular loop
(Refer to figure 13.8, page no. 228 of N.C.E.R.T Text book)
? The strength of the magnetic field at he centre of the loop(coil)depends on:
(i) The radius of the coil- The strength of the magnetic field is inversely
proportional to the radius of the coil. If the radius increases, the
magnetic strength at the centre decreases.
(ii) The number of turns in the coil: As the number of turns in the coil
increase, the magnetic strength at the centre increases, because the
current in each circular turn is having the same direction, thus the
field due to each turn adds up.
(iii) The strength of the current flowing in the coil: as the strength of the
current increases, the strength of thee magnetic fields also increases.
? Solenoid: (Refer to figure 13.10, page no. 229 of N.C.E.R.T Text book)
? (i) A coil of many turns of insulated copper wire wrapped in the shape of a cylinder is called
a Solenoid.
(ii) Magnetic field produced by a Solenoid is similar to a bar magnet.
(iii) The strength of magnetic field is proportional to the number of turns & magnitude of
current.
www.ncerthelp.com
Visit www.ncerthelp.com for Ncert Solutions in Text and Video , CBSE Sample papers, Exam tips,
NCERT BOOKS, Motivational Videos, Notes for All Classes and Many More...
65
? Electromagnet: An electromagnet consists of a long coil of insulated copper wire wrapped on
a soft iron core.
(Refer to figure 13.11, page no. 229 of N.C.E.R.T Text book)
? Fleming‘s Left hand rule: Stretch the thumb, forefinger and middle finger of left hand such
that they are mutually perpendicular. Forefinger points in the direction of magnetic field and
centre finger in the direction of current, then the thumb gives the direction of force acting on
the conductor.
(Refer to figure13.13, page no. 231 13.13 of N.C.E.R.T Text book)
? Electric motor: A device that converts electric energy to mechanical energy.
(Refer to figure 13.15, page no. 232 of N.C.E.R.T Text book)
? Principle of Electric motor: When a rectangular coil is placed in a magnetic field and a
current is passed through it, force acts on the coil, which rotates it continuously. With the
rotation of the coil, the shaft attached to it also rotates.
? Electromagnetic induction: Electricity production as a result of magnetism (induced current)
is called Electromagnetic induction.
? Fleming‘s Right hand rule: gives the direction of induced current.
Stretch the thumb, forefinger and middle finger of right hand such that they are mutually
perpendicular. Forefinger points in the direction of magnetic field and centre finger in the
direction of induced current, then the thumb gives the direction of motion of the conductor.
? Electric generator: A devise that converts mechanical energy to electric energy.
(Refer to figure 13.19, page no. 236 of N.C.E.R.T Text book)
Electric generator is of two types- (i) A.C generator (ii) D. C generator
? Principle of Electric generator: Electromagnetic induction
? Domestic electric circuits: (Refer to figure 13.20, page 238 of N.C.E.R.T Text book)
? We receive electric supply through mains supported through the poles or cables. In our houses
we receive AC electric power of 220V with a frequency of 50Hz.
The 3 wires are as follows- (i) Live wire- (Red insulated, Positive)
(ii) Neutral wire- (Black insulated, Negative)
(iii) Earth wire- (Green insulated) for safety measure to ensure
that any leakage of current to a metallic body does not give
any serious shock to a user.
? Short circuit: is caused by touching of live wires and neutral wire
? Fuse: is a protective device used for protecting the circuits from short circuiting and over
loading
? Important diagrams-
1. Magnetic field lines around a bar magnet.
2. Right hand thumb rule
3. Magnetic field lines through and around a current carrying solenoid.
4. An electromagnet.
5. A simple electric motor
6. Electric generator
www.ncerthelp.com
Visit www.ncerthelp.com for Ncert Solutions in Text and Video , CBSE Sample papers, Exam tips,
NCERT BOOKS, Motivational Videos, Notes for All Classes and Many More...
66
? Important activities-
1. Magnetic field lines around a bar magnet
2. Direction of electric current in a simple electric circuit.
3. Direction of Magnetic field lines depends on the direction of electric current.
MIND MAP
FORMATIVE ASSESSMENT I
Q. PAPER
MARKS-30 TIME- 70 MINUTES
Instructions:
? Questions : 1 to 5 – 1 Mark each
? Questions : 6 to 9 – 2 Marks each
? Questions : 10 to 13 – 3 Marks each
? Question 14 – 5 Marks
1. State two uses of electromagnet.
2. An electron moving along X – axis in a magnetic field along Y – axis. In which direction
will the electron deflected.
MAGNETIC
EFFECT OF
ELECTRIC
CURRENT
Safety measure
Fuse Earth
wire
Magnet and its
properties
Magnetic field lines
& properties.
Right hand thumb
rule
Solenoid
Electro magnet
Fleming left hand
rule
Electric motor
Fleming right hand rule.
Electromagnetic induction.
Generator
Domestic
electric circuits
www.ncerthelp.com
Visit www.ncerthelp.com for Ncert Solutions in Text and Video , CBSE Sample papers, Exam tips,
NCERT BOOKS, Motivational Videos, Notes for All Classes and Many More...
67
3. State Fleming‘s left hand rule.
4. What is the importance of earth wire?
5. Should a copper wire be used as a fuse wire? If not, why?
6. Give two points of difference between and electromagnet and permanent magnet.
7. Draw the lines of force indicating field direction of the magnetic field through and around
i) Single loop of wire carrying electric current.
ii) A solenoid carrying electric current.
8. What id magnetic field? How is the direction of magnetic field at a point determined?
9. Give four features of domestic electric wiring.
10. Draw a schematic diagram of domestic wiring system and write its main features.
11. Match the following:
A B
i) Right hand thumb rule a) Force on a conductor in a magnetic field
ii) Fleming‘s left hand rule b) Direction of magnetic field of straight
conductor
iii) Fleming‘s right hand rule c) Direction of induced current in
conductor
d) Polarity of any end of a solenoid.
12. a) Draw a labelled diagram to show how electro – magnet is made.
b) What is the purpose of soft iron core in making electromagnet?
13. Write two differences between AC and DC current and draw diagram also.
14. a) Write principle of electric generator.
b) Explain construction and working of generator.
c) Draw labelled diagram of electric generator.
HOTS QUESTIONS (SOLVED)
1. On what effect of an electric current does an electromagnet work?
A. Magnetic effect of electric current
2. What is the frequency of AC (Alternating Current) in India?
A. 50Hz
3. On what effect of an electric current does a fuse work?
A. Heating effect of electric current
HOTS QUESTIONS (UNSOLVED)
1. Name the sources of direct current.
2. Why don‘t two magnetic lines intersect each other?
3. What is the role of split ring in an electric motor?
4. What is an earth wire?
www.ncerthelp.com
Visit www.ncerthelp.com for Ncert Solutions in Text and Video , CBSE Sample papers, Exam tips,
NCERT BOOKS, Motivational Videos, Notes for All Classes and Many More...
Page 5
64
MAGNETIC EFFECTS OF ELECTRIC CURRENT
KEY CONCEPTS & GIST OF THE LESSON
? Magnet: (i) is an object that attracts objects made of iron, cobalt & nickel.
(ii) Comes to rest in North-South direction, when suspended freely.
? Magnets are used: (i) In radio & stereo speakers, (ii) In refrigerator doors, (iii) on audio &
video cassettes players, (iv) On hard discs & floppies of computers & (v) in children‘s toys.
? Magnetic field: The area around a magnet where a magnetic force is experienced is called a
magnetic field. It is a quantity that has both direction & magnitude.
? Magnetic field lines: Magnetic field is represented by field lines. They are lines drawn in a
Magnetic field along which a North magnetic pole moves. Magnetic field lines are called as
Magnetic lines of force.
Refer to figure 13.3 & 13.4 page no. 225 of N.C.E.R.T Text book)
? Properties of Magnetic field lines:
(i) They do not intersect each other.
(ii) It is taken by convention that magnetic field lines emerge from
North pole and merge at the South pole. Inside the magnet, their
direction is from South pole to North pole. Therefore magnetic field
lines are closed curves.
? Magnetic field lines due to a current through a straight conductor (wire)- consist of series of
concentric circles whose direction is given by the Right hand thumb rule.
? Right hand thumb rule: If a current carrying straight conductor is held in your right hand such
that the thumb points towards the direction of current, then the wrapped fingers show the
direction of magnetic field lines.
(Refer to figure 13.7, page no. 228 of N.C.E.R.T Text book)
? Magnetic field lines due to a current through a circular loop
(Refer to figure 13.8, page no. 228 of N.C.E.R.T Text book)
? The strength of the magnetic field at he centre of the loop(coil)depends on:
(i) The radius of the coil- The strength of the magnetic field is inversely
proportional to the radius of the coil. If the radius increases, the
magnetic strength at the centre decreases.
(ii) The number of turns in the coil: As the number of turns in the coil
increase, the magnetic strength at the centre increases, because the
current in each circular turn is having the same direction, thus the
field due to each turn adds up.
(iii) The strength of the current flowing in the coil: as the strength of the
current increases, the strength of thee magnetic fields also increases.
? Solenoid: (Refer to figure 13.10, page no. 229 of N.C.E.R.T Text book)
? (i) A coil of many turns of insulated copper wire wrapped in the shape of a cylinder is called
a Solenoid.
(ii) Magnetic field produced by a Solenoid is similar to a bar magnet.
(iii) The strength of magnetic field is proportional to the number of turns & magnitude of
current.
www.ncerthelp.com
Visit www.ncerthelp.com for Ncert Solutions in Text and Video , CBSE Sample papers, Exam tips,
NCERT BOOKS, Motivational Videos, Notes for All Classes and Many More...
65
? Electromagnet: An electromagnet consists of a long coil of insulated copper wire wrapped on
a soft iron core.
(Refer to figure 13.11, page no. 229 of N.C.E.R.T Text book)
? Fleming‘s Left hand rule: Stretch the thumb, forefinger and middle finger of left hand such
that they are mutually perpendicular. Forefinger points in the direction of magnetic field and
centre finger in the direction of current, then the thumb gives the direction of force acting on
the conductor.
(Refer to figure13.13, page no. 231 13.13 of N.C.E.R.T Text book)
? Electric motor: A device that converts electric energy to mechanical energy.
(Refer to figure 13.15, page no. 232 of N.C.E.R.T Text book)
? Principle of Electric motor: When a rectangular coil is placed in a magnetic field and a
current is passed through it, force acts on the coil, which rotates it continuously. With the
rotation of the coil, the shaft attached to it also rotates.
? Electromagnetic induction: Electricity production as a result of magnetism (induced current)
is called Electromagnetic induction.
? Fleming‘s Right hand rule: gives the direction of induced current.
Stretch the thumb, forefinger and middle finger of right hand such that they are mutually
perpendicular. Forefinger points in the direction of magnetic field and centre finger in the
direction of induced current, then the thumb gives the direction of motion of the conductor.
? Electric generator: A devise that converts mechanical energy to electric energy.
(Refer to figure 13.19, page no. 236 of N.C.E.R.T Text book)
Electric generator is of two types- (i) A.C generator (ii) D. C generator
? Principle of Electric generator: Electromagnetic induction
? Domestic electric circuits: (Refer to figure 13.20, page 238 of N.C.E.R.T Text book)
? We receive electric supply through mains supported through the poles or cables. In our houses
we receive AC electric power of 220V with a frequency of 50Hz.
The 3 wires are as follows- (i) Live wire- (Red insulated, Positive)
(ii) Neutral wire- (Black insulated, Negative)
(iii) Earth wire- (Green insulated) for safety measure to ensure
that any leakage of current to a metallic body does not give
any serious shock to a user.
? Short circuit: is caused by touching of live wires and neutral wire
? Fuse: is a protective device used for protecting the circuits from short circuiting and over
loading
? Important diagrams-
1. Magnetic field lines around a bar magnet.
2. Right hand thumb rule
3. Magnetic field lines through and around a current carrying solenoid.
4. An electromagnet.
5. A simple electric motor
6. Electric generator
www.ncerthelp.com
Visit www.ncerthelp.com for Ncert Solutions in Text and Video , CBSE Sample papers, Exam tips,
NCERT BOOKS, Motivational Videos, Notes for All Classes and Many More...
66
? Important activities-
1. Magnetic field lines around a bar magnet
2. Direction of electric current in a simple electric circuit.
3. Direction of Magnetic field lines depends on the direction of electric current.
MIND MAP
FORMATIVE ASSESSMENT I
Q. PAPER
MARKS-30 TIME- 70 MINUTES
Instructions:
? Questions : 1 to 5 – 1 Mark each
? Questions : 6 to 9 – 2 Marks each
? Questions : 10 to 13 – 3 Marks each
? Question 14 – 5 Marks
1. State two uses of electromagnet.
2. An electron moving along X – axis in a magnetic field along Y – axis. In which direction
will the electron deflected.
MAGNETIC
EFFECT OF
ELECTRIC
CURRENT
Safety measure
Fuse Earth
wire
Magnet and its
properties
Magnetic field lines
& properties.
Right hand thumb
rule
Solenoid
Electro magnet
Fleming left hand
rule
Electric motor
Fleming right hand rule.
Electromagnetic induction.
Generator
Domestic
electric circuits
www.ncerthelp.com
Visit www.ncerthelp.com for Ncert Solutions in Text and Video , CBSE Sample papers, Exam tips,
NCERT BOOKS, Motivational Videos, Notes for All Classes and Many More...
67
3. State Fleming‘s left hand rule.
4. What is the importance of earth wire?
5. Should a copper wire be used as a fuse wire? If not, why?
6. Give two points of difference between and electromagnet and permanent magnet.
7. Draw the lines of force indicating field direction of the magnetic field through and around
i) Single loop of wire carrying electric current.
ii) A solenoid carrying electric current.
8. What id magnetic field? How is the direction of magnetic field at a point determined?
9. Give four features of domestic electric wiring.
10. Draw a schematic diagram of domestic wiring system and write its main features.
11. Match the following:
A B
i) Right hand thumb rule a) Force on a conductor in a magnetic field
ii) Fleming‘s left hand rule b) Direction of magnetic field of straight
conductor
iii) Fleming‘s right hand rule c) Direction of induced current in
conductor
d) Polarity of any end of a solenoid.
12. a) Draw a labelled diagram to show how electro – magnet is made.
b) What is the purpose of soft iron core in making electromagnet?
13. Write two differences between AC and DC current and draw diagram also.
14. a) Write principle of electric generator.
b) Explain construction and working of generator.
c) Draw labelled diagram of electric generator.
HOTS QUESTIONS (SOLVED)
1. On what effect of an electric current does an electromagnet work?
A. Magnetic effect of electric current
2. What is the frequency of AC (Alternating Current) in India?
A. 50Hz
3. On what effect of an electric current does a fuse work?
A. Heating effect of electric current
HOTS QUESTIONS (UNSOLVED)
1. Name the sources of direct current.
2. Why don‘t two magnetic lines intersect each other?
3. What is the role of split ring in an electric motor?
4. What is an earth wire?
www.ncerthelp.com
Visit www.ncerthelp.com for Ncert Solutions in Text and Video , CBSE Sample papers, Exam tips,
NCERT BOOKS, Motivational Videos, Notes for All Classes and Many More...
68
MAGNETIC EFFECT
ORAL QUESTIONS
1. a) What are magnets?
b) What are natural magnets?
c) What is the meaning of the word lodestone?
d) What is the origin of the word magnetism?
2. a) State the law of magnetic poles.
b) What is the surer test of magnetism?
c) What happens if we break a magnet into two pieces?
d) Is it possible to obtain isolated north and south poles?
3. a) What is magnetic line of force?
b) Can two magnetic lines of force intersect? Give reason.
c) Magnetic lines of force are endless. Comment.
d) How do the field lines of the regions of strong field different from those of weak field?
4. a) What is a solenoid?
b) Is the magnetic field of a solenoid similar to that of a bar magnet?
c) State the two factors by which the strength of magnetic field inside a solenoid can be
increased.
d) How will you determine the direction of the magnetic field due to a current – carrying
solenoid?
5. a) What is an electromagnet?
b) What is the effect of placing an iron core in a solenoid?
c) What type of core should be used inside a solenoid to make an electromagnet?
d) Give two advantages of electromagnets.
ORAL QUESTIONS
1. What important observation did Oersted make in his experiments with current carrying
conductors?
2. How can you locate a current – carrying wire concealed in a wall?
3. A freely suspended magnet always points along north – south direction. Why?
4. What type of core should be used inside a solenoid to make an electromagnet?
www.ncerthelp.com
Visit www.ncerthelp.com for Ncert Solutions in Text and Video , CBSE Sample papers, Exam tips,
NCERT BOOKS, Motivational Videos, Notes for All Classes and Many More...
Read More
Related Exams
About this Document
|
4.71/5 Rating |
|
Nov 15, 2024 Last updated |
Document Description: Magnetic Effect of Electric Current notes+ Sample Paper:- for Class 10 2024 is part of Class 10 preparation. The notes and questions for Magnetic Effect of Electric Current notes+ Sample Paper:- have been prepared according to the Class 10 exam syllabus. Information about Magnetic Effect of Electric Current notes+ Sample Paper:- covers topics like and Magnetic Effect of Electric Current notes+ Sample Paper:- Example, for Class 10 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises and tests below for Magnetic Effect of Electric Current notes+ Sample Paper:-.
Introduction of Magnetic Effect of Electric Current notes+ Sample Paper:- in English is available as part of
our Class 10 preparation & Magnetic Effect of Electric Current notes+ Sample Paper:- in Hindi for Class 10
courses. Download more important topics, notes, lectures and mock test series for Class 10
Exam by signing up for free. Class 10: Magnetic Effect of Electric Current notes+ Sample Paper:- - Class 10
Description
Full syllabus notes, lecture & questions for Magnetic Effect of Electric Current notes+ Sample Paper:- - Class 10 - Class 10 | Plus excerises question with solution to help you revise complete syllabus | Best notes, free PDF download
Information about Magnetic Effect of Electric Current notes+ Sample Paper:-
In this doc you can find the meaning of Magnetic Effect of Electric Current notes+ Sample Paper:- defined & explained in the simplest way possible.
Besides explaining types of Magnetic Effect of Electric Current notes+ Sample Paper:- theory,
EduRev gives you an ample number of questions to practice Magnetic Effect of Electric Current notes+ Sample Paper:- tests, examples and also practice Class 10 tests.
Download as PDF
|
Explore Courses for Class 10 exam
|
|
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
Related Searches
ppt
,Objective type Questions
,Viva Questions
,Magnetic Effect of Electric Current notes+ Sample Paper:- - Class 10
,Free
,video lectures
,Important questions
,Summary
,Sample Paper
,shortcuts and tricks
,Exam
,Magnetic Effect of Electric Current notes+ Sample Paper:- - Class 10
,practice quizzes
,study material
,MCQs
,Magnetic Effect of Electric Current notes+ Sample Paper:- - Class 10
,Extra Questions
,Semester Notes
,mock tests for examination
,past year papers
,Previous Year Questions with Solutions
;
Additional Information about Magnetic Effect of Electric Current notes+ Sample Paper:- for Class 10 Preparation
Magnetic Effect of Electric Current notes+ Sample Paper:- Free PDF Download
The Magnetic Effect of Electric Current notes+ Sample Paper:- is an invaluable resource that delves deep into the core of the Class 10 exam.
These study notes are curated by experts and cover all the essential topics and concepts, making your preparation more efficient and effective.
With the help of these notes, you can grasp complex subjects quickly, revise important points easily,
and reinforce your understanding of key concepts. The study notes are presented in a concise and easy-to-understand manner,
allowing you to optimize your learning process. Whether you're looking for best-recommended books, sample papers, study material,
or toppers' notes, this PDF has got you covered. Download the Magnetic Effect of Electric Current notes+ Sample Paper:- now and kickstart your journey towards success in the Class 10 exam.
Importance of Magnetic Effect of Electric Current notes+ Sample Paper:-
The importance of Magnetic Effect of Electric Current notes+ Sample Paper:- cannot be overstated, especially for Class 10 aspirants.
This document holds the key to success in the Class 10 exam.
It offers a detailed understanding of the concept, providing invaluable insights into the topic.
By knowing the concepts well in advance, students can plan their preparation effectively.
Utilize this indispensable guide for a well-rounded preparation and achieve your desired results.
Magnetic Effect of Electric Current notes+ Sample Paper:-
Magnetic Effect of Electric Current notes+ Sample Paper:- Notes offer in-depth insights into the specific topic to help you master it with ease.
This comprehensive document covers all aspects related to Magnetic Effect of Electric Current notes+ Sample Paper:-.
It includes detailed information about the exam syllabus, recommended books, and study materials for a well-rounded preparation.
Practice papers and question papers enable you to assess your progress effectively.
Additionally, the paper analysis provides valuable tips for tackling the exam strategically.
Access to Toppers' notes gives you an edge in understanding complex concepts.
Whether you're a beginner or aiming for advanced proficiency, Magnetic Effect of Electric Current notes+ Sample Paper:- Notes on EduRev are your ultimate resource for success.
Magnetic Effect of Electric Current notes+ Sample Paper:- Class 10 Questions
The "Magnetic Effect of Electric Current notes+ Sample Paper:- Class 10 Questions" guide is a valuable resource for all aspiring students preparing for the
Class 10 exam. It focuses on providing a wide range of practice questions to help students gauge
their understanding of the exam topics. These questions cover the entire syllabus, ensuring comprehensive preparation.
The guide includes previous years' question papers for students to familiarize themselves with the exam's format and difficulty level.
Additionally, it offers subject-specific question banks, allowing students to focus on weak areas and improve their performance.
Study Magnetic Effect of Electric Current notes+ Sample Paper:- on the App
Students of Class 10 can study Magnetic Effect of Electric Current notes+ Sample Paper:- alongwith tests & analysis from the EduRev app,
which will help them while preparing for their exam. Apart from the Magnetic Effect of Electric Current notes+ Sample Paper:-,
students can also utilize the EduRev App for other study materials such as previous year question papers, syllabus, important questions, etc.
The EduRev App will make your learning easier as you can access it from anywhere you want.
The content of Magnetic Effect of Electric Current notes+ Sample Paper:- is prepared as per the latest Class 10 syllabus.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup