All the rules and laws of D.C. circuit also apply to A.C. circuit containing_____________?

The period of a sine wave is _____ seconds. Its frequency is

A. 20 Hz

B. 30 Hz

C. 40 Hz

D. 50 Hz

The peak value of a sine wave is 200 V. Its average value is___________?

A. 127.4 V

B. 141.4 V

C. 282.8 V

D. 200V

The power consumed in a circuit element will be least when the phase difference between the current and voltage is__________?

A. 180″

B. 90°

C. 60°

D. 0°

For the same peak value which of the following wave will ‘have the highest r.m.s. value?

A. square wave

B. half wave rectified sine wave

C. triangular wave

D. sine wave

The phase difference between voltage and current wave through a circuit element is given as 30°. The essential condition is that

A. both waves must have same frequency

B. both waves must have identical peak values

C. both waves must have zero value at the same time

D. none of the above