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Electrostatics - Interview Questions and Answers

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21. Out of the following capacitors of identical rating which one will have the smallest dimensions ?
A. Aluminium foil capacitor
B. Mica capacitor
C. Ceramic capacitor
D. Paper capacitor
Explanation:
22. Acharge which when placed in vacuum from an equal and similar charge repels with a force of 9 x 10 N, is known as
A. milli-coulomb
B. micro-coulomb
C. pico-coulomb
D. coulomb
Explanation:
23. When a dielectric is placed in an electric field the field strength
A. decreases
B. increases
C. reduces to zero
D. remain unchanged
Explanation:
24. An electrolytic capacitor can be used for
A. D.C. only
B. AC. only
C. both D.C. as well as A.C.
D. D.C. only
Explanation:
25. The capacitance C is charged through a resistance R. The time constant of the charging circuit is given by
A. CIR
B. 1/RC
C. RC
D. RIC
Explanation:
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