MAGNETIC EFFECTS OF ELECTRIC CURRENT - Class 10 PDF Download

 Page 1


CHAPTER  - 13
MAGNETIC  EFFECTS  OF  
ELECTRIC  CURRENT
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CHAPTER  - 13
MAGNETIC  EFFECTS  OF  
ELECTRIC  CURRENT
1) Magnetic field and Field lines :-
a) Magnetic field :-
The region around a magnet where the force of attraction 
or repulsion can be detected  is called magnetic field.
Magnetic field around a magnet can be detected by using 
a magnetic compass.
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CHAPTER  - 13
MAGNETIC  EFFECTS  OF  
ELECTRIC  CURRENT
1) Magnetic field and Field lines :-
a) Magnetic field :-
The region around a magnet where the force of attraction 
or repulsion can be detected  is called magnetic field.
Magnetic field around a magnet can be detected by using 
a magnetic compass.
b) Magnetic field lines :-
Magnetic field lines are the paths around a magnet along which the 
north pole of a magnetic compass needle tends to move.
The magnetic field lines around a magnet can be observed by 
sprinkling iron filings around a magnet. It can also be observed by 
moving a magnetic compass around a magnet.
i) The magnetic field lines emerge at the north pole and merge at the 
south pole.
ii) The magnetic field lines are closer at the poles.
iii) The magnetic field lines do not intersect each other.
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CHAPTER  - 13
MAGNETIC  EFFECTS  OF  
ELECTRIC  CURRENT
1) Magnetic field and Field lines :-
a) Magnetic field :-
The region around a magnet where the force of attraction 
or repulsion can be detected  is called magnetic field.
Magnetic field around a magnet can be detected by using 
a magnetic compass.
b) Magnetic field lines :-
Magnetic field lines are the paths around a magnet along which the 
north pole of a magnetic compass needle tends to move.
The magnetic field lines around a magnet can be observed by 
sprinkling iron filings around a magnet. It can also be observed by 
moving a magnetic compass around a magnet.
i) The magnetic field lines emerge at the north pole and merge at the 
south pole.
ii) The magnetic field lines are closer at the poles.
iii) The magnetic field lines do not intersect each other.
2) Magnetic field due to a current carrying conductor :-
If a magnetic compass is placed near a conductor carrying current 
(wire), the needle is deflected. This shows that a conductor carrying 
current has a magnetic field around it.
If the direction of the current is from north to south, the deflection of 
the magnetic needle is towards the  east.
If the direction of the current is from south to north, the deflection of 
the needle is towards the west.
The magnetic field around a current carrying straight conductor is in 
concentric circles. It can be observed by passing a current carrying 
straight conductor through a cardboard and sprinkling iron filings on it.
N
N
S S
W E
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CHAPTER  - 13
MAGNETIC  EFFECTS  OF  
ELECTRIC  CURRENT
1) Magnetic field and Field lines :-
a) Magnetic field :-
The region around a magnet where the force of attraction 
or repulsion can be detected  is called magnetic field.
Magnetic field around a magnet can be detected by using 
a magnetic compass.
b) Magnetic field lines :-
Magnetic field lines are the paths around a magnet along which the 
north pole of a magnetic compass needle tends to move.
The magnetic field lines around a magnet can be observed by 
sprinkling iron filings around a magnet. It can also be observed by 
moving a magnetic compass around a magnet.
i) The magnetic field lines emerge at the north pole and merge at the 
south pole.
ii) The magnetic field lines are closer at the poles.
iii) The magnetic field lines do not intersect each other.
2) Magnetic field due to a current carrying conductor :-
If a magnetic compass is placed near a conductor carrying current 
(wire), the needle is deflected. This shows that a conductor carrying 
current has a magnetic field around it.
If the direction of the current is from north to south, the deflection of 
the magnetic needle is towards the  east.
If the direction of the current is from south to north, the deflection of 
the needle is towards the west.
The magnetic field around a current carrying straight conductor is in 
concentric circles. It can be observed by passing a current carrying 
straight conductor through a cardboard and sprinkling iron filings on it.
N
N
S S
W E
Right hand thumb rule :-
The direction of the magnetic field around a conductor is given by the 
Right  Hand Thumb Rule.
It states that ‘ If a current carrying conductor is held in the right hand 
such that the thumb points in the direction of current, then the fingers 
wrapped around the conductor shows the direction of the magnetic
field ’.