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AC Fundamentals, Circuit and Circuit Theory

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

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

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

Inductance
Both of the listed here
Resistance
Capacitance

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AC Fundamentals, Circuit and Circuit Theory
In an A.C. circuit power is dissipated in

Capacitance only
Inductance only
None of the listed here
Resistance only

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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

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

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AC Fundamentals, Circuit and Circuit Theory
In any A.C. circuit always

Reactive power is more than actual power
Actual power is more than reactive power
Apparent power is more than actual power
Reactive power is more than apparent power

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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.

5
10
15
25

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