 # AC Circuit objective questions (mcq) and answers

6.  In an AC circuit a low value of KVAR compared with KW indicates

A. Low efficiency

B. High power factor

C. Unity power factor

B. High power factor

7.  A parallel AC circuit in resonance will

A. Have a high voltage developed across each inductive and capacitive section

B. Have a high impedance

C. Act like a resister of low value

D. Have current in each section equal to the line current

B. Have a high impedance

8.  The frequency of an alternating current is

A. The speed with which the alternator runs

B. The number of cycles generated in one minute

C. The number of waves passing through a point in one second

D. The number of electrons passing through a point in one second

C. The number of waves passing through a point in one second

9.  A pure capacitor connected across an AC voltage consumed 50 V. This is due to

A. The capacitive reactance in ohms

B. The current flowing in capacitor

C. The size of the capacitor being quite big

D. None of the above

D. None of the above

10.  The unit of frequency is

A. Cycle

B. Cycle-second

C. Hertz/second

D. Hertz