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Electromagnetic Induction - Interview Questions and Answers

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16. Which of the following is unit of inductance ?
A. Ohm
B. Henry
C. Ampere turns
D. Webers/metre
Explanation:
17. A 200 turn coil has an inductance of 12 mH. If the number of turns is increased to 400 turns, all other quantities (area, length etc.) remaining the same, the inductance will be
A. 6 mH
B. 14 mH
C. 24 mH
D. 48 mH
Explanation:
18. Mutually inductance between two magnetically-coupled coils depends on
A. permeability of the core
B. the number of their turns
C. cross-sectional area of their com-mon core
D. all of the above
Explanation:
19. Which circuit element(s) will oppose the change in circuit current ?
A. Resistance only
B. Inductance only
C. Capacitance only
D. Inductance and capacitance
Explanation:
20. Find the force acting on a conductor 3m long carrying a current of 50 amperes at right angles to a magnetic field having a flux density of 0.67 tesla.
A. 100 N
B. 400 N
C. 600 N
D. 1000 N
Explanation:
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