A. actual power is zero
B. reactive power is zero
C. apparent power is zero
D. none of above is zero
Related Mcqs:
- In a pure resistive circuit__________?
A. current lags behind the voltage by 90°
B. current leads the voltage by 90°
C. current can lead or lag the voltage by 90°
D. current is in phase with the voltage - Time constant of a capacitive circuit__________?
A. increases with the decrease of capacitance and decrease of resistance
B. increases with the decrease of capacitance and increase of resistance
C. increases with the increase of capacitance and decrease of resistance
D. increase with increase of capacitance and increase of resistance - At _______ frequencies the parallel R-L circuit behaves as purely resistive
A. low
B. very low
C. high
D. very high - Power factor of an inductive circuit is usually improved by connecting capacitor to it in____________?
A. parallel
B. series
C. either A. or (b)
D. none of the above - Time constant of an inductive circuit___________?
A. increases with increase of inductance and decrease of resistance
B. increases with the increase of inductance and the increase of resistance
C. increases with decrease of inductance and decrease of resistance
D. increases with decrease of inductance and increase of resistance - Pure inductive circuit____________?
A. consumes some power on average
B. does not take power at all from a line
C. takes power from the line during some part of the cycle and then returns back to it during other part of the cycle
D. none of the above - In a pure inductive circuit___________?
A. the current is in phase with the voltage
B. the current lags behind the voltage by 90°
C. the current leads the voltage by 90°
D. the current can lead or lag by 90° - 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 fourth - Pure inductive circuit takes power from the A.C. line when_________?
A. applied voltage decreases but current increases
B. applied voltage increases but current decreases
C. both applied voltage and current increase
D. both applied voltage and current decrease - Time constant of an inductive circuit_________?
A. increases with increase of inductance and decrease of resistance
B. increases with the increase of inductance and the increase of resistance
C. increases with the decrease of inductance and decrease of resistance
D. increases with decrease of inductance and increase of resistance
