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AC Fundamentals, Circuit and Circuit Theory

AC Fundamentals, Circuit and Circuit Theory
In a purely inductive circuit

None of the listed here
Apparent power is zero
Actual power is zero
Reactive power is zero

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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
50 jt
25 JT

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AC Fundamentals, Circuit and Circuit Theory
The effective resistance of an iron-cored choke working on ordinary supply frequency is more than its true resistance because of

Increase in temperature
Capacitive effect between adjacent coil turns
Iron loss in core
Skin effect

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AC Fundamentals, Circuit and Circuit Theory
The input of an A.C. circuit having power factor of 0.8 lagging is 40 kVA The power drawn by the circuit is

36 kW
40 kW
32 kW
80 kW

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AC Fundamentals, Circuit and Circuit Theory
The r.m.s. value of half wave rectified sine wave is 200 V. The r.m.s. value of full wave rectified AC. will be

100 V
111 V
141.4 V
282.8 V

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AC Fundamentals, Circuit and Circuit Theory
When an alternating current passes through an ohmic resistance the electrical power converted into heat is

Reactive power
None of the listed here
Active power
Apparent power

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