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AC Fundamentals, Circuit and Circuit Theory

AC Fundamentals, Circuit and Circuit Theory
A sine wave has a frequency of 50 Hz. Its angular frequency is __________ radian/second.

5 n
100 n
25 JT
50 jt

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AC Fundamentals, Circuit and Circuit Theory
In a pure capacitive circuit if the supply frequency is reduced to 1/2, the current will

Be reduced by half
Be reduced to one fourth
Be four times at high
Be doubled

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AC Fundamentals, Circuit and Circuit Theory
In a loss-free R-L-C circuit the transient current is

Sinusoidal
Non-oscillating
Oscillating
Square wave

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AC Fundamentals, Circuit and Circuit Theory
If a sinusoidal wave has frequency of 50 Hz with 30 A r.m.s. current which of the following equation represents this wave?

84.84 sin 25 t
42.42 sin 314 t
60 sin 25 t
30 sin 50 t

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AC Fundamentals, Circuit and Circuit Theory
All definitions of power factor of a series R-L-C circuit are correct except

Ratio of J and Z
Ratio of net reactance and impedance
Ratio of kW and kVA
Ratio of W and VA

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AC Fundamentals, Circuit and Circuit Theory
The r.m.s. value and mean value is the same in the case of

Sine wave
Triangular wave
Square wave
Half wave rectified sine wave

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