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AC Fundamentals, Circuit and Circuit Theory

AC Fundamentals, Circuit and Circuit Theory
In a loss-free R-L-C circuit the transient current is

Non-oscillating
Square wave
Oscillating
Sinusoidal

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AC Fundamentals, Circuit and Circuit Theory
The time constant of a series R-C circuit is given by

RC
R/C
RC2
R2C

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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

None of the listed here
Active power
Reactive power
Apparent power

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AC Fundamentals, Circuit and Circuit Theory
In a series L-C circuit at the resonant frequency the

Voltage across C is minimum
Current is minimum
Impedance is maximum
Current is maximum

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AC Fundamentals, Circuit and Circuit Theory
The voltage of domestic supply is 220 V. This figure represents

Mean value
Average value
R.m.s. value
Peak value

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

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

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