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AC Fundamentals, Circuit and Circuit Theory

AC Fundamentals, Circuit and Circuit Theory
Power factor of the following circuit will be unity

Inductance
Resistance
None of the listed here
Capacitance

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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

32 kW
36 kW
40 kW
80 kW

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AC Fundamentals, Circuit and Circuit Theory
The reactance offered by a capacitor to alternating current of frequency 50 Hz is 20 ohm. If frequency is increased to 100 Hz, reactance becomes __________ ohms.

10
15
25
5

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AC Fundamentals, Circuit and Circuit Theory
Form Factor is the ratio of

r.m.s. value/peak value
Average value/peak value
Average value/r.m.s. value
r.m.s. value/average value

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AC Fundamentals, Circuit and Circuit Theory
The peak value of a sine wave is 200 V. Its average value is

282.8 V
141.4 V
127.4 V
200 V

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AC Fundamentals, Circuit and Circuit Theory
Ohm is unit of all of the following except

Resistance
Capacitive reactance
Capacitance
Inductive reactance

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