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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°
90°
45°
30°

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AC Fundamentals, Circuit and Circuit Theory
The r.m.s. value of a sinusoidal A.C. current is equal to its value at an angle of ________ degrees.

90
60
30
45

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AC Fundamentals, Circuit and Circuit Theory
For the same peak value, which of the following wave has the least mean value?

Sine wave
Triangular wave
Square wave
Half wave rectified sine wave

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AC Fundamentals, Circuit and Circuit Theory
Inductance affects the direct current flow

Only at the time of turning on
At all the time of operation
Only at the time of turning off
At the time of turning on and off

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AC Fundamentals, Circuit and Circuit Theory
Skin effect occurs when a conductor carries current at _________ frequencies.

Low
High
Very low
Medium

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AC Fundamentals, Circuit and Circuit Theory
In R-L-C series resonant circuit magnitude of resonance frequency can be changed by changing the value of

L or C
R only
C only
L only

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