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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 low
Low
Very high

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

Inductance
Resistance
Capacitance
Both of the listed here

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AC Fundamentals, Circuit and Circuit Theory
In a pure resistive circuit

None of the listed here
Current can lead or lag the voltage by 90°
Current is in phase with the voltage
Current lags behind the voltage by 90°

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AC Fundamentals, Circuit and Circuit Theory
When an alternating current passes through an ohmic resistance the electrical power converted into heat is

Reactive power
None of the listed here
Active power
Apparent power

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AC Fundamentals, Circuit and Circuit Theory
For a sine wave with peak value Emax ___________ the average value is

None of the listed here
0.707 Emax
0.636 Emax
0.434 Emax

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

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

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