Electromagnetic Induction - Interview Questions | Exam2Win

Ready to test your skills?

Take a timed mock test specifically for Electromagnetic Induction.

Start Mock Test

21. Lenz's law is a consequence of the law of conservation of

A. induced current

B. charge

C. energy

D. induced e.m.f.

Explanation:

22. A conductor 2 metres long moves at right angles to a magnetic field of flux density 1 tesla with a velocity of 12.5 m/s. The induced e.m.f. in the conductor will be

A. 10 V

B. 15 V

C. 25V

D. 50V

Explanation:

23. Two coils have inductances of 8 mH and 18 mH and a co-efficient of coupling of 0.5. If the two coils are connected in series aiding, the total inductance will be

A. 32 mH

B. 38 mH

C. 40 mH

D. 48 mH

Explanation:

24. The co-efficient of coupling between two air core coils depends on

A. self-inductance of two coils only

B. mutual inductance between two coils only

C. mutual inductance and self inductance of two coils

D. none of the above

Explanation:

25. A coil is wound on iron core which carries current I. The self-induced voltage in the coil is not affected by

A. variation in coil current

B. variation in voltage to the coil

C. change of number of turns of coil

D. the resistance of magnetic path

Explanation:

« Prev 1 2 3 4 5 6 7 8 Next »