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Sunday, 16 August 2026
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Physics Past Questions and Answers

Topic: (a) Electromagnetic Induction

Jamb Physics Questions - (a) Electromagnetic Induction

Question 46:
Two inductors of inductances 5 mll and 15 mll are connected in series and a current of 5A flows through them. the total energy stored in the inductor is
  • A 500.0J
  • B 250.0J
  • C 62.5J
  • D 50.0J
  • E No correct option
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Question 47:
Two inductors of inductance 4 II and 8 II are arrange in series and a current of 10 A is passed through them. What is the energy stored in them?
  • A 600 J
  • B 50 J
  • C 133 J
  • D 250 J
View Answer & Explanation
Question 48:
The core of an efficient transformer should consist of laminated pieces of metal in order to
  • A Increase the heat produced by increasing the eddy current
  • B Increase the heat produced by reducing the eddy current
  • C Reduce the heat produced by increasing the eddy current
  • D Reduce the heat produced by reducing the eddy current
View Answer & Explanation
Question 49:
A semiconductor diode is used in rectifying alternating current into direct current mainly because it
  • A Allows current to flow in either direction
  • B Is non-linear
  • C Offers a high input resistance
  • D Allows current to flow only in one direction
View Answer & Explanation
Question 50:
A conductor of length 2m carries a current of 0.8A while kept in a magnetic field of magnetic flux density 0.5T. The maximum force acting on it is
  • A 0.2N
  • B 0.8N
  • C 3.2N
  • D 8.0N
View Answer & Explanation