The time constant of a series R-C circuit is given by____________?
The time constant of a series R-C circuit is given by____________?
A. R/C
B. RC2
C. RC
D. R2C
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Power factor of electric bulb is__________?
Power factor of electric bulb is__________?A. zero
B. lagging
C. leading
D. unityIn a pure inductive circuit if the supply frequency is reduced to 1/2, the current will__________?
In a pure inductive circuit if the supply frequency is reduced to 1/2, the current will__________?A. be reduced by half
B. be doubled
C. be four times as high
D. be reduced to one fourthIn series resonant circuit, increasing inductance to its twice value and reducing capacitance to its half value__________?
In series resonant circuit, increasing inductance to its twice value and reducing capacitance to its half value__________?A. will change the maximum value of current at resonance
B. will change the resonance frequency
C. will change the impedance at resonance frequency
D. will increase the selectivity of the circuitForm factor for a sine wave is________?
Form factor for a sine wave is________?A. 1.414
B. 0.707
C. 1.11
D. 0.637Which of the following waves has the highest value of peak factor ___________?
Which of the following waves has the highest value of peak factor ___________?A. Square wave
B. Sine wave
C. Half wave rectified sine wave
D. Triangular waveThe 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 above