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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 11:
A closed coil of wire is placed near a magnet. The magnet lies along the axis of the coil. Under which of the following conditions would there be no current in the coil?
  • A When the coil is moved toward the stationary magnet
  • B When the coil is moved away from the stationary magnet
  • C When the coil is held stationary but the magnet is moved towards the coil
  • D When both the coil and the magnet are held stationary
  • E When the coil is held stationary but the magnet is moved away from the cell
View Answer & Explanation
Question 12:
On which of the following does the operation of a moving coil ammeter depend? i. Electromagnetic induction ii. Force on a carrying-current conductor iii. Magnetic effect of an electric current
  • A I only
  • B Ii only
  • C Iii only
  • D Ii and iii only
  • E I,ii and iii
View Answer & Explanation
Question 13:
A transformer has a primary coil with 500 turns and a secondary coil with 2500 turns. When the voltage input to the primary coil is 120V, the output is
  • A 6000V
  • B 600V
  • C 240V
  • D 60V
  • E 24V
View Answer & Explanation
Question 14:
Which of the following is most strongly deflected by magnetic field?
  • A \(\gamma\) - rays
  • B X- particle
  • C \(\beta\) - particles
  • D X - rays
View Answer & Explanation
Question 15:
When a transformer has more secondary windings than primary windings, it
  • A Has a smaller secondary current
  • B Has a greater power output
  • C Is a step-down transformer
  • D Increases the total energy output
View Answer & Explanation