Magnetic Effects of Electric Current

Subject matter experts of JagranJosh have developed chapter wise practice questions as per the relevancy of the chapter in the CBSE board exam. This practice set contains 10 questions with detailed explanations on “Chapter: Magnetic Effects of Electric Current” of Science.

• Q1.An induced emf is produced when a magnet is moved into a coil. The magnitude of induced emf does not depend on:

  A) The speed with which the magnet is moved
  B) The number of turns of the coil
  C) The resistivity of the wire of the coil
  D) The strength of the magnet
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• Q2.A positive charge is moving towards a person. The direction of magnetic field lines will be in

  A) Clockwise direction
  B) Anticlockwise direction
  C) Vertically upward direction
  D) Vertically downward direction
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• Q3.A fuse should always be placed in the

  A) Live wire of the main circuit
  B) Neutral wire of the main circuit
  C) Earth wire of the main circuit
  D) Bothe live and neutral wire of the main circuit.
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• Q4.If two circular coils can be arranged in any of the three situations as shown in the diagrams below, then their mutual induction will be:
  

  A) Maximum in situation (a)
  B) Maximum in situation (b)
  C) Maximum in situation (c)
  D) The same in all situations
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• Q5.A coil of insulated copper wire is connected to a galvanometer forming a loop and a magnet is:
  A: Held stationary
  B: Moved away along its axis
  C: Moved towards along its axis
  There will be a induced current in:

  A) A only
  B) A and B only
  C) B and C only
  D) A, B and C
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• Q6.The shape of the magnetic field lines produced by a current carrying conductor are:

  A) Straight lines
  B) Concentric circles
  C) Concentric ellipse
  D) Concentric parabolas
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• Q7.An electric motor is a device which transforms

  A) Mechanical energy into electrical energy
  B) Electrical energy into mechanical energy
  C) Kinetic energy into potential energy
  D) Electrical energy into Potential energy
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