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Sunday, 21 June 2026
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Physics Past Questions and Answers

Topic: Electromagnetic Induction

Jamb Physics Questions - Electromagnetic Induction

Question 1:
A magnet is moved through a coil of wire. The e.m.f. produced in the wire depends on
  • A The number of turns in the coil
  • B The strength of the magnet
  • C The speed at which the magnet is moved
  • D All of the above
  • E None of the above
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Question 2:
On an a.c generator, which of the following does not apply?
  • A Field magnet
  • B Commutator
  • C Armature
  • D Slip rings
  • E Carbon brushes
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Question 3:
On which of the following is the operation of a moving coil galvanometer based?
  • A Magnetic effect of electric current
  • B Electromagnetic induction
  • C Chemical reaction produced by electricity
  • D Force on current carrying conductor in a magnetic field
  • E Electrical energy and power
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Question 4:
Fig 8 shows a current I flowing in a copper wire situated in a magnetic field existing between the pole-pieces of a horse-shoe magnet.
Which of the following statements is correct?
  • A The wire will experience a force in the direction into the paper
  • B The wire will experience a force in the direction out of the paper
  • C The wire will vibrate in a direction into and out of the paper
  • D The wire will move in the direction of the field i.e toward the s-pole
  • E The wire will not move because it is made of copper which is non magnetic
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Question 5:
The best material for the core of the primary and secondary coils of an induction coil is
  • A Copper, because it has a good conductor of electricity
  • B Steel, because it becomes magnetic and retains its magnetism for a long time
  • C Rubber, because it is a good insulator and the user is prevented from shock
  • D Soft iron, because it becomes magnetic but easily loses its magnetism
  • E Glass, because it is transparent
View Answer & Explanation