Electromagnetic Induction MCQs

By: Prof. Dr. Fazal Rehman | Last updated: May 20, 2025

1. : The total number of magnetic field lines passing through an area is called
(A) Magnetic flux density
(B) Magnetic flux
(C) E.M.F (Electromagnetic Force)
(D) Voltage

2. : A consequence of the motor effect is
(A) E.M.F (Electromagnetic Force)
(B) Current
(C) Voltage
(D) Electromagnetic induction

3. : E.M.F (Electromagnetic Force) can be induced in a circuit by
(A) Changing magnetic flux density
(B) Changing the area of a circuit
(C) Changing the angle
(D) All of the above

4. : By accelerating a magnet inside the coil, the current in it
(A) Increases
(B) Decreases
(C) Remains constant
(D) Reverses

5. : E.M.F (Electromagnetic Force) for a coil depends upon
(A) The cross-sectional area and the magnitude of magnetic flux density
(B) Number of turns of wire
(C) Both A and B
(D) None of the above

6. : In generators, the rate of change of flux linkage is maximum when the coil is moving through the
(A) Vertical position
(B) Horizontal position
(C) Diagonal position
(D) None of the above

7. : For a straight wire, the induced current depends upon
(A) The speed of movement of the wire
(B) The length of wire
(C) The magnitude of magnetic flux density
(D) All of the above

8. : In a transformer, the core is made up of soft iron in order to pass the maximum amount of
(A) Flux
(B) Current
(C) Magnetic flux
(D) Voltage

9. : The magnitude of induced E.M.F is proportional to
(A) Rate of change of current
(B) Rate of change of voltage
(C) Rate of change of magnetic flux linkage
(D) Rate of change of resistance

10. : The induced current in a coil by a magnet turns it into an
(A) Straight wire
(B) Magnet
(C) Ammeter
(D) Electromagnet

11. : Moving a coil in and out of a magnetic field induces
(A) Force
(B) Potential difference
(C) Voltage
(D) Electromagnetic force

12. : Currents that flow in circles inside a disc are called
(A) Air currents
(B) Circular currents
(C) Eddy currents
(D) None of the above