A. iron loss in core
B. skin effect
C. increase in temperature
D. capacitive effect between adjacent coil turns
Related Mcqs:
- 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 - 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 frequency of domestic power supply in Pakistan is_________?
A. 200 Hz
B. 100 Hz
C. 60 Hz
D. 50 Hz - The period of a sine wave is _____ seconds. Its frequency is
A. 20 Hz
B. 30 Hz
C. 40 Hz
D. 50 Hz - Two waves of the same frequency have opposite phase when the phase angle between them is_________?
A. 360°
B. 180°
C. 90°
D. 0° - The frequency of an alternating current is____________?
A. the speed with which the alternator runs
B. the number of cycles generated in one minute
C. the number of waves passing through a point in one second
D. the number of electrons passing through a point in one second - What will be the phase angle between two alternating waves of equal frequency, when one wave attains maximum value the other is at zero value________ ?
A. 0°
B. 45°
C. 90°
D. 180° - In a series L-C circuit at the resonant frequency the__________?
A. current is maximum
B. current is minimum
C. impedance is maximum
D. voltage across C is minimum
