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AC Fundamentals, Circuit and Circuit Theory

AC Fundamentals, Circuit and Circuit Theory
In a series resonant circuit, the impedance of the circuit is

Maximum
None of these
Minimum
Zero

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

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AC Fundamentals, Circuit and Circuit Theory
In the case of an unsymmetrical alternating current the average value must always be taken over

The quarter cycle
Unsymmetrical part of the wave form
The whole cycle
The half cycle

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AC Fundamentals, Circuit and Circuit Theory
Time constant of a circuit is the time in seconds taken after the application of voltage to each

25% of maximum value
63% of maximum value
90% of the maximum value
50% of maximum value

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AC Fundamentals, Circuit and Circuit Theory
The transient currents are associated with the

Changes in the stored energy in the inductors and capacitors
Applied voltage to the circuit
Impedance of the circuit
Resistance of the circuit

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AC Fundamentals, Circuit and Circuit Theory
Which of the following waves has the highest value of peak factor ?

Square wave
Triangular wave
Sine wave
Half wave rectified sine wave

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