1000+ Alternating Current MCQS Questions and Answers Pdf - 2

Question: 6

A capacitor is a perfect insulator for

(A) direct as well as alternating current

(B) alternating current

(C) direct current

(D) none of the above

Question: 7

______ will work only on d.c. supply

(A) Electroplating

(B) Heater

(C) Refrigerator

(D) Electric lamp

Question: 8

In a pure resistive a.c. circuit, the frequency of power curve is _____ that of the circuit frequency.

(A) same as

(B) thrice

(C) twice

(D) half

Question: 9

_____ will produce a.c. voltage.

(A) Thermal energy

(B) Crystal

(C) Photoelectric effect

(D) Friction

Question: 10

The a.c. system is preferred to d.c. system because

(A) d.c. voltage cannot be used for domestic appliances

(B) high voltage a.c. transmission is less efficient

(C) d.c. motors do not have fine speed control

(D) a.c. voltages can be easily changed in magnitude