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AC Fundamentals, Circuit and Circuit Theory

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

High
Very high
Very low
Low

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AC Fundamentals, Circuit and Circuit Theory
Power factor of an electrical circuit is equal to

Ratio of useful current to total current Iw/I
R/Z
Cosine of phase angle difference between current and voltage
all of these

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

Resistance
None of the listed here
Capacitance
Inductance

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AC Fundamentals, Circuit and Circuit Theory
Form factor for a sine wave is

1.414
0.637
0.707
1.11

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AC Fundamentals, Circuit and Circuit Theory
The main cause of silting up a channel,

All of these
Inadequate slope
Non-regime section
Defective head regulator

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AC Fundamentals, Circuit and Circuit Theory
The power consumed in a circuit element will be least when the phase difference between the current and voltage is

90°
30°
60°
180°

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