All questions of Magnetic Effects of Electric Current for Class 10 Exam

• a)
  Magnetic field 
• b)
  Electric Field
• c)
  Electromagnetic field
• d)
  None of these

• a)
  North pole
• b)
  Center point
• c)
  South pole
• d)
  Either north pole or south pole

• a)
  Straight
• b)
  Circular
• c)
  Elliptical
• d)
  Parabolic

• A:

  North-South

• B:

  East-West

• C:

  North-east

• D:

  North-west

The answer is a.

• A:

  eastwards

• B:

  downwards

• C:

  southwards

• D:

  northwards

The answer is c.

• a)
  current
• b)
  voltage
• c)
  no current
• d)
  heat

• a)
  Insulation of wire is damaged
• b)
  fault in the appliances
• c)
  accidental hike in supply voltage
• d)
  All of the above

• a)
  Cobalt
• b)
  Nickel
• c)
  Steel
• d)
  Silver

• a)
  open loops
• b)
  closed loops
• c)
  straight lines
• d)
  Both closed loops and straight lines

• a)
  magnetic field applied
• b)
  current flown in the conductor
• c)
  induced current
• d)
  mechanical force on the conductor

• a)
  Like magnetic poles repel
• b)
  Unlike magnetic poles attract
• c)
  Both of these
• d)
  None of these

• a)
  soft iron
• b)
  hard iron
• c)
  rusted iron
• d)
  none of above

If the circuit is closed and magnetic field lines are drawn over the horizontal plane ABCD, the lines are

• a)
  concentric circles
• b)
  elliptical in shape
• c)
  straight lines parallel to each other
• d)
  concentric circles near the point O but of elliptical shapes as we go away from it

• a)
  force is also reversed
• b)
  force remains same
• c)
  electromagnetic field is reversed
• d)
  electric field is also reversed

• a)
  is same every where around the conductor
• b)
  is directly proportional to the square of distance of a point from the conductor
• c)
  is directly proportional to the current flowing in the conductor
• d)
  is inversely proportional to the current

• a)
  Right-hand thumb rule
• b)
  Left-hand thumb rule
• c)
  Fleming’s left-hand rule
• d)
  Fleming’s right-hand rule

• a)
  The field lines inside the solenoid are in the form of straight lines which indicates that the magnetic field is the same at all points inside the solenoid.
• b)
  The strong magnetic field produced inside the solenoid can be used to magnetise a piece of magnetic material like soft iron, when placed inside the coil.
• c)
  The pattern of the magnetic field associated with the solenoid is different from the pattern of the magnetic field around a bar magnet.
• d)
  The N-pole and S-pole exchange position when the direction of current through the solenoid is reversed.

• a)
  Magnetic poles always exist in pairs
• b)
  Magnetic poles must have same magnetic strength
• c)
  Like magnetic poles attract each other
• d)
  Unlike magnetic poles attract each other

A constant current I flows through a horizontal metal wire in the plane of the paper from east to west as shown in the figure. The direction of magnetic field will be from north to south at a point :

• a)
  directly above the wire
• b)
  directly below the wire
• c)
  on the north side of the wire in the plane of the paper
• d)
  on the south side of the wire in the plane of the paper

• a)
  increases on increasing current flowing through the solenoid coil
• b)
  increases on increasing the number of turns in the solenoid coil
• c)
  increases on introducing a soft iron core inside the solenoid coil
• d)
  all of the above

• a)
  Orsted
• b)
  Fleming
• c)
  Einstein
• d)
  Maxwell

• a)
  magnetic field
• b)
  magnetic strength
• c)
  magnetic power
• d)
  magnetic intensity

• a)
  Maxwell’s cork screw rule
• b)
  Ampere’s rule
• c)
  Fleming’s left-hand rule
• d)
  Fleming’s right-hand rule

• a)
  (1) and (2) only
• b)
  (2) and (3) only
• c)
  (2) only
• d)
  (1) only 

• a)
  The direction of the force remains the same.
• b)
  The direction of the force is reversed.
• c)
  The magnitude of the force is doubled.
• d)
  The force becomes zero.

• a)
  If both Assertion and Reason are true and Reason is the correct explanation of Assertion
• b)
  If both Assertion and Reason are true but Reason is not the correct explanation of Assertion
• c)
  If Assertion is true but Reason is false
• d)
  If both Assertion and Reason are false

• a)
  is zero
• b)
  decreases as we move towards its end
• c)
  increases as we move towards its end
• d)
  is the same at all points

• a)
  The force is at its maximum.
• b)
  The force is zero.
• c)
  The force is doubled.
• d)
  The force becomes perpendicular to the field.

• a)
  If both Assertion and Reason are true and Reason is the correct explanation of Assertion
• b)
  If both Assertion and Reason are true but Reason is not the correct explanation of Assertion
• c)
  If Assertion is true but Reason is false
• d)
  If both Assertion and Reason are false

• a)
  Overvoltage
• b)
  Short-circuiting
• c)
  Power surges
• d)
  Underloading

• a)
  more at the ends than at the centre
• b)
  minimum in the middle
• c)
  same at all points
• d)
  found to increase from one end to the other

• a)
  mass
• b)
  speed
• c)
  velocity
• d)
  momentum

• a)
  earthing
• b)
  use of fuse
• c)
  use of stabilizers
• d)
  use of electric meter

• a)
  is zero.
• b)
  decreases as we move towards its end.
• c)
  increases as we move towards its end.
• d)
  is the same at all points.

• a)
  A coil of a few circular turns
• b)
  A long, straight wire
• c)
  A coil of many circular turns of insulated wire
• d)
  A single loop of wire

• a)
  If both Assertion and Reason are true and Reason is the correct explanation of Assertion
• b)
  If both Assertion and Reason are true but Reason is not the correct explanation of Assertion
• c)
  If Assertion is true but Reason is false
• d)
  If both Assertion and Reason are false

• a)
  If both Assertion and Reason are true and Reason is the correct explanation of Assertion
• b)
  If both Assertion and Reason are true but Reason is not the correct explanation of Assertion
• c)
  If Assertion is true but Reason is false
• d)
  If both Assertion and Reason are false

• a)
  Plastic rod
• b)
  Bar magnet
• c)
  Conductor
• d)
  Resistor

• a)
  gravitational field
• b)
  magnetic field
• c)
  static field
• d)
  electric field

• a)
  To increase the current flow
• b)
  To decrease the voltage
• c)
  To protect the circuit from short-circuiting or overloading
• d)
  To amplify the magnetic field

• a)
  North-South
• b)
  East-West
• c)
  North-east
• d)
  North-west

• a)
  Electric
• b)
  Magnetic
• c)
  Gravitational
• d)
  Static

• a)
  There are circular magnetic field lines around it
• b)
  There are magnetic field lines parallel to the conductor
• c)
  There are no magnetic field lines
• d)
  None of the above

• a)
  Left-hand thumb rule
• b)
  Right-hand thumb rule
• c)
  Left-hand finger rule
• d)
  Right-hand finger rule

• a)
  To increase the flow of current
• b)
  To prevent damage due to overloading
• c)
  To regulate the voltage
• d)
  To enhance electrical conductivity

• a)
  Magnetic effect of current
• b)
  Electric effect of current
• c)
  Heating effect of current
• d)
  Chemical effect of current

• a)
  The magnetic field is strongest at the ends of the solenoid.
• b)
  The magnetic field inside the solenoid is uniform and parallel to the axis.
• c)
  The magnetic field inside the solenoid is zero.
• d)
  The magnetic field inside the solenoid fluctuates randomly.

• a)
  Magnetic Field Lines - Concentric Circles around a Straight Current-Carrying Wire
• b)
  Right-Hand Thumb Rule - Direction of Electric Current
• c)
  Deflection of Compass Needle - Decreases with Increased Current
• d)
  Magnetic Field Strength - Increases with Distance from Wire

• a)
  Right-hand thumb rule - Direction of magnetic field around a current-carrying straight conductor
• b)
  Right-hand thumb rule - Direction of magnetic field around a current-carrying circular loop
• c)
  Maxwell's corkscrew rule - Motion of charged particles in a magnetic field
• d)
  Magnetic field lines - Intersection of two magnetic field lines

• a)
  Perpendicular
• b)
  Parallel
• c)
  Opposite
• d)
  Random