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AC Fundamentals, Circuit and Circuit Theory

AC Fundamentals, Circuit and Circuit Theory
The equation of 50 Hz current sine wave having r.m.s. value of 60 A is

60 sin 25 t
84.84 sin 3141
60 sin 50 t
42.42 sin 314 t

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AC Fundamentals, Circuit and Circuit Theory
Power factor of an inductive circuit is usually improved by connecting capacitor to it in

Series
Both parallel and series
Parallel
None of the listed here

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AC Fundamentals, Circuit and Circuit Theory
In a sine wave the slope is constant

No where
Between 0° and 90°
Between 90° and 180°
Between 180° and 270°

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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

Half wave rectified sine wave
Sine wave
Square wave
Triangular wave

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

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AC Fundamentals, Circuit and Circuit Theory
Which of the following statements pertains to resistors only?

Oppose sudden changes in voltage
Connecting them in parallel increases the total value
Can act as energy storage devices
Can dissipate considerable amount of power

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