A.C circuit and networks. Part – 4

31. for symmetrical wave form average value of one full cycle is

A. 1

B. 1.11

C. 2.22

D. 0 

32. What is called the frequency in AC operation

A. No. Of +ve quadrature made per second

B. No. Of cycles made per second

C. No. Of –ve quadrature made per second

D. No. Of wave made per second

33. The RMS value and main value is the same in the case of

A. triangular wave

B. sine wave

C. square wave

D. half wave rectified sine wave

34. In a purely inductive circuit

A. Actual power is zero

B. Reactive power is zero

C. Apperent power is zero

D. None of the above is zero

35. The power is measured in terms of decibles in case of

A. Electronic equipment

B. Transformers

C. Current transformers

D. Auto transformers

36. The period of a wave is

A. The same as frequency

B. Time required to complete one cycle

C. Expressed in amperes

D. None of the above

37. In any A.C. circuit always

A. Apparent power is more than actual power

B. Reactive power is more than apparent power

C. Actual power is more than reactive power

D. Reactive power is more than actual power

38. Which of the following coil will have large resonant frequency?

A. A coil with large resistance

B. A coil with low resistance

C. A coil with large distributed capacitance

D. A coil with low distributed capacitance

39. RMS value is defined based on which of the following

A. Heating effect

B. Charge transfer

C. Voltage

D. Current

40. What is the real power in AC operation?

A. VIcosθ

B. apperant power × cosθ

C. both A and B

D. none of these