A. 200 Hz
B. 100 Hz
C. 60 Hz
D. 50 Hz
Related Mcqs:
- 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 - A sine wave has a frequency of 50 Hz. Its angular frequency is ________ radian/second.
A. 100 n
B. 50 jt
C. 25 JT
D. 5 n - 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. 15 - The voltage of domestic supply is 220V. This figure represents__________?
A. mean value
B. r.m.s. value
C. peak value
D. average value - Two waves of the same frequency have opposite phase when the phase angle between them is_________?
A. 360°
B. 180°
C. 90°
D. 0° - In a pure capacitive 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 at high
D. be reduced to one fourth - 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 - The effective resistance of an iron-cored choke working on ordinary supply frequency is more than its true resistance because of____________?
A. iron loss in core
B. skin effect
C. increase in temperature
D. capacitive effect between adjacent coil turns - The ratio of active power to apparent power is known as factor__________?
A. demand
B. load
C. power
D. form - 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
