# Electromagnetic Induction MCQ Questions for Class 12 Physics Chapter 6 with Answers

Find here the NCERT chapter-wise Multiple Choice Questions from Class 12 Physics book Chapter 6 Electromagnetic Induction with Answers Pdf free download. This may assist you to understand and check your knowledge about the chapters. Students also can take a free test of the Multiple Choice Questions of Electromagnetic Induction. Each question has four options followed by the right answer. These MCQ Questions are selected supported by the newest exam pattern as announced by CBSE.

## Q1. Direction of current induced in a wire moving in a magnetic field is found using

(i) Fleming’s left hand rule
(ii) Fleming’s right hand rule
(iii) Ampere’s rule
(iv) Right hand clasp rule

(ii) Fleming’s right hand rule

## Q2. An e– and a p– are moving parallel to each other in a magnetic field. The magnetic force acting on the p+ is:

(i) 1840 times that on e–
(ii) less than that of e–
(iii) same as that of e–
(iv) slightly more than that of e–

(iii) same as that of e–

## Q3. Lenz’s law of electromagnetic induction is as per law of conservation of

(i) energy.
(ii) momentum angular.
(iii) charge.
(iv) electromotive force.

(i) energy.

## Q4. Which of the following will not induce an emf in a coil in the absence of an external voltage source?

(i) the coil being in a time-varying magnetic field.
(ii) the coil moving in a time-varying magnetic field.
(iii) the coil moving in a constant magnetic field.
(iv) the coil is stationary in external spatially varying magnetic field, which does not change with time.

(iv) the coil is stationary in external spatially varying magnetic field, which does not change with time.

## Q5. A moving conductor coil produces an induced e.m.f. This is in accordance with

(i) Lenz’s law
(iii) Coulomb’s law
(iv) Ampere’s law

(i) Galvanometer
(ii) Ammeter
(iii) Voltmeter
(iv)Meter Bridge

(i) Galvanometer

## Q7. Two identical coaxial coils P and Q carrying equal amount of current in the same direction are brought nearer. The current in

(i) P increases while in Q decreases
(ii) Q increases while in P decreases
(iii) both P and Q increases
(iv) both P and Q decreases

(iv) both P and Q decreases

## Q8. The magnetic field is parallel to a surface, then the magnetic flux through the surface is :

(i) zero
(ii) small but not zero
(iii) infinite
(iv) large but not infinite

(ii) small but not zero

(i) 0.2 mH
(ii) 2.0 mH
(iii) 0.02 mH
(iv) 0.002 H

(iii) 0.02 mH

## Q10. The self-inductance L of a solenoid of length l and area of cross-section A, with a fixed number of turns N increases as

(i) l and A increase.
(ii) l decreases and A increases.
(iii) l increases and A decreases.
(iv) both l and A decrease.

(ii) l decreases and A increases.

## Q11. According to Faraday’s law of electromagnetic induction

(i) electric field is produced by time varying magnetic flux.
(ii) magnetic field is produced by time varying electric flux.
(iii) magnetic field is associated with a moving charge.
(iv) None of these

(i) Farady’s law states that time varying magnetic flux can induce an e.m.f.

## Q12. In the second experiment, Faraday replaced ‘X’ with ‘Y’ for checking the deflection in the galvanometer. Identify X and Y.

(i) X ➔ Current carrying coil; Y ➔ Bar magnet
(ii) X ➔ Bar magnet; Y ➔ Current carrying coil
(iii) X ➔ Bar magnet; Y ➔ Battery
(iv) X ➔ Current carrying coil; Y ➔ Battery

(ii) X ➔ Bar magnet; Y ➔ Current carrying coil

## Q13. Faraday’s laws are consequence of the conservation of

(i) charge
(ii) energy
(iii) magnetic field
(iv) both (ii) and (iii)

(ii) energy

## Q14. The coupling co-efficient of the perfectly coupled coils is:

(i) Zero
(ii) 1
(iii) slightly more than 1
(iv) infinite

(ii) 1

(i) 0.1 V
(ii) 0.5 V
(iii) 1 V
(iv) 5 V

(iv) 5 V

(i) 5.4 mH
(ii) 162 mH
(iii) 0.006 mH
(iv) 0.0002 mH

(ii) 162 mH

## Q17. An induced e.m.f. is produced when a magnet is plunged into a coil. The strength of the induced e.m.f. is independent of

(i) the strength of the magnet
(ii) number of turns of coil
(iii) the resistivity of the wire of the coil
(iv) speed with which the magnet is moved

(iii) the resistivity of the wire of the coil

## Q18. A solenoid is connected to a battery so that a steady current flows through it. If an iron core is inserted into the solenoid, the current will

(i) increase
(ii) decrease
(iii) remain same
(iv) first increase then decrease

(ii) decrease

(i) 11%
(ii) 50%
(iii) 80%
(iv) 90%

(iv) 90%

(i) 10 V
(ii) -10 V
(iii) 5 V
(iv) -5 V

(ii) -10 V

## Q21. Name the current induced in solid metallic masses when the magnetic flux threading through them changes.

(i) Ampere currents
(iii) Eddy currents
(iv) Solenoidal currents

(iii) Eddy currents

(i) Ampere
(ii) Tesla meter
(iii) Weber
(iv) Maxwell

(iii) Weber

## Q23. A metal plate can be heated by

(i) passing either a direct or alternating current through the plate.
(ii) placing in a time varying magnetic field.
(iii) placing in a space varying magnetic field, but does not vary with time.
(iv) both (i) and (ii) are correct.

(iv) both (i) and (ii) are correc

(i) inertia
(ii) force
(iii) energy
(iv) momentum

(i) inertia

## Q25. Two identical coaxial coils P and Q carrying equal amount of current in the same direction are brought nearer. The current in

(i) P increases while in Q decreases
(ii) Q increases while in P decreases
(iii) both P and Q increases
(iv) both P and Q decreases

(iv) both P and Q decreases

## Q26. Whenever the magnetic flux linked with an electric circuit changes, an emf is induced in the circuit. This is called

(i) electromagnetic induction
(ii) lenz’s law
(iii) hysteresis loss
(iv) kirchhoff’s laws

(i) electromagnetic induction

(i) Maxwell
(ii) Gauss
(iii) Tesla
(iv) Ampere

(i) Maxwell

## Q28. Which of the following does not use the application of eddy current?

(i) Electric power meters
(ii) Induction furnace
(iii) LED lights
(iv) Magnetic brakes in trains

(iii) LED lights

(i) 5 µV
(ii) 50 µV
(iii) 5 mV
(iv) 50 mV

(i) 5 µV

## Q30. Direction of current induced in a wire moving in a magnetic field is found using

(i) Fleming’s left hand rule
(ii) Fleming’s right hand rule
(iii) Ampere’s rule
(iv) Right hand clasp rule

(ii) Fleming’s right hand rule

## Q31. The coils in resistance boxes are made from doubled insulated wire to nullify the effect of

(i) heating
(ii) magnetism
(iii) pressure
(iv) self induced e.m.f.

(iv) self induced e.m.f.

## Q32. Which among the following is true about Faraday’s law of Induction?

(i) An emf is induced in a conductor when it cuts the magnetic flux
(ii) An emf is induced in a conductor when it moves parallel to the magnetic field
(iii) An emf is induced in a conductor when it moves perpendicular to the magnetic field
(iv) An emf is induced in a conductor when it is just entering a magnetic field

(i) An emf is induced in a conductor when it cuts the magnetic flux

(i) 0.360
(ii) 0.362
(iii) 0.724
(iv) 0.726

(ii) 0.362

## Q34. If number of turns in primary and secondary coils is increased to two times each, the mutual inductance

(i) becomes 4 times
(ii) becomes 2 times
(iii) becomes A times
(iv) remains unchanged 4

(i) becomes 4 times

## Q35. A choke is used as a resistance in :

(i) dc circuits
(ii) ac circuits
(iii) both ac and dc circuits
(iv) neither (i) nor (ii)

(ii) ac circuits

(i) zero
(ii) L
(iii) 2L
(iv) 3L

(iii) 2L

## Q37. When current in a coil changes from 5 A to 2 A in 0.1 s, average voltage of 50 V is produced, The self-inductance of the coil is

(i) 1.67 H
(ii) 6 H
(iii) 3 H
(iv) 0.67 H

(i) 1.67 H

I Think the given NCERT MCQ Questions for class 12 Physics book Chapter 6 Electromagnetic Induction with Answers Pdf free download will assist you. If you’ve got any queries regarding CBSE Class 12 Physics Electromagnetic Induction MCQs Multiple Choice Questions with Answers, drop a comment below and that we will come back to you soon.