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AC Fundamentals, Circuit and Circuit Theory

AC Fundamentals, Circuit and Circuit Theory
What will be the phase angle between two alternating waves of equal frequency, when one wave attains maximum value the other is at zero value?

180°
45°
90°
30°

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AC Fundamentals, Circuit and Circuit Theory
In a pure inductive circuit if the supply frequency is reduced to 1/2, the current will

Be reduced by half
Be reduced to one fourth
Be four times as high
Be doubled

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AC Fundamentals, Circuit and Circuit Theory
Magnitude of current at resonance in R-L-C circuit

Depends upon the magnitude of R
Depends upon the magnitude of R, Land C
Depends upon the magnitude of L
Depends upon the magnitude of C

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AC Fundamentals, Circuit and Circuit Theory
At __________ frequencies the parallel R-L circuit behaves as purely resistive.

High
Low
Very high
Very low

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

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

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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

Triangular wave
Square wave
Sine wave
Half wave rectified sine wave

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