The peak value of a sine wave is 200 V. Its average value is___________?
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
B. 141.4 V
C. 282.8 V
D. 200V
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The reactance offered by a capacitor to alternating current of frequency 50 Hz is 20 Q. If frequency is increased to 100 Hz, reactance becomes_______ohms?
The reactance offered by a capacitor to alternating current of frequency 50 Hz is 20 Q. If frequency is increased to 100 Hz, reactance becomes_______ohms?A. 2.5
B. 5
C. 10
D. 15The time constant of the capacitance circuit is defined as the time during which voltage________?
The time constant of the capacitance circuit is defined as the time during which voltage________?A. falls to 36.8% of its final steady value
B. rises to 38.6% of its final steady value
C. rises to 63.2% of its final steady value
D. none of the aboveThe phase difference between voltage and current wave through a circuit element is given as 30°. The essential condition is that
The phase difference between voltage and current wave through a circuit element is given as 30°. The essential condition is thatA. 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 aboveThe period of a sine wave is _____ seconds. Its frequency is
The period of a sine wave is _____ seconds. Its frequency isA. 20 Hz
B. 30 Hz
C. 40 Hz
D. 50 HzIn an A.C. circuit power is dissipated in____________?
In an A.C. circuit power is dissipated in____________?A. resistance only
B. inductance only
C. capacitance only
D. none of the abovePower factor of the following circuit will be unity
Power factor of the following circuit will be unityA. inductance
B. capacitance
C. resistance
D. both A. and B.