AC FUNDAMENTALS, CIRCUIT AND CIRCUIT THEORY QUIZ

The ratio of active power to apparent power is known as factor.

Power

Demand

Load

Form

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At very low frequencies a series R-C circuit behaves as almost purely

None of the listed here

Capacitive

Inductive

Resistive

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The purpose of a parallel circuit resonance is to magnify

Voltage

Current

Frequency

Power

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Inductance affects the direct current flow

Only at the time of turning off

At all the time of operation

At the time of turning on and off

Only at the time of turning on

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The r.m.s. value and mean value is the same in the case of

Triangular wave

Half wave rectified sine wave

Sine wave

Square wave

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The square waveform of current has following relation between r.m.s. value and average value.

r.m.s. value of current is less than average value

None of these

r.m.s. value is equal to average value

r.m.s. value of current is greater than average value

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Capacitive reactance is more when

Capacitance is less and frequency of supply is more

Capacitance is more and frequency of supply is less

Capacitance is less and frequency of supply is less

Capacitance is more and frequency of supply is more

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In a series L-C circuit at the resonant frequency the

Impedance is maximum

Voltage across C is minimum

Current is maximum

Current is minimum

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The frequency of domestic power supply in India is

200 Hz

150 Hz

50 Hz

250 Hz

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In each of the three coils of a three phase generator, an alternating voltage having an r.m.s. value of 220 V is induced. Which of the following values is indicated by the voltmeters?

220 V

220/v3 V

None of these

220 v3 V

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