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AC Fundamentals, Circuit and Circuit Theory

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

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

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AC Fundamentals, Circuit and Circuit Theory
Time constant of a circuit is the time in seconds taken after the application of voltage to each

63% of maximum value
25% of maximum value
90% of the maximum value
50% of maximum value

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AC Fundamentals, Circuit and Circuit Theory
In a highly capacitive circuit the

Actual power is more than its reactive power
Apparent power is equal to the actual power
Reactive power is more than the apparent power
Reactive power is more than the actual power

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

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

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

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

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

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