A. zero
B. lagging
C. leading
D. unity
Related Mcqs:
- The input of an A.C. circuit having power factor of 0.8 lagging is 40 kVA The power drawn by the circuit is__________?
A. 12 kW
B. 22 kW
C. 32 kW
D. 64 kW - The apparent power drawn by an A.C. circuit is 10 kVA and active power is 8 kW. The reactive power in the circuit is_________?
A. 4 kVAR
B. 6 kVAR
C. 8 kVAR
D. 16 kVAR - 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° - When an alternating current passes through an ohmic resistance the electrical power converted into heat is__________?
A. apparent power
B. true power
C. reactive power
D. none of the above - Power factor of an electrical circuit is equal to____________?
A. R/Z
B. cosine of phase angle difference be-tween current and voltage
C. kW/kVA
D. ratio of useful current to total cur¬rent Iw/I
E. all of these - Power factor of the following circuit will be unity
A. inductance
B. capacitance
C. resistance
D. both A. and B. - Power factor of the following circuit will be zero__________?
A. resistance
B. inductance
C. capacitance
D. both B. and C. - Power factor of the system is kept high__________?
A. to reduce line losses
B. to maximise the utilization of the capacities of generators, lines and transformers
C. to reduce voltage regulation of the line
D. due to all above reasons - The power factor of a D.C. circuit is always__________?
A. less than unity
B. unity
C. greater than unity
D. zero - All definitions of power factor of a series R-L-C circuit are correct except__________?
A. ratio of net reactance and impedance
B. ratio of kW and kVA
C. ratio of J and Z
D. ratio of W and VA
