Welcome to your AC Circuits MCQ practice assessment.

In series resonant circuit, increasing inductance to its twice value and reducing capacitance to its half value

Power factor of an inductive circuit is usually improved by connecting capacitor to it in

Pure inductive circuit takes power from the A.C. line when

The time constant of the capacitance circuit is defined as the time during which voltage

In a series resonant circuit, the impedance of the circuit is

A sine wave has a frequency of 50 Hz. Its angular frequency is _______ radian/second

The form factor is the ratio of

The phase difference between voltage and current wave through a circuit element is given as 30°. The essential condition is that

The input of an A.C. circuit having power factor of 0.8 lagging is 40 kVA The power drawn by the circuit is

The reactance offered by a capacitor to alternating current of frequency 50 Hz is 20 Q. If frequency is increased to 100 Hz, reactance becomes _____ ohms

The r.m.s. value of a sinusoidal A.C. current is equal to its value at an angle of______degrees

In a loss-free R-L-C circuit the transient current is

The safest value of current the human body can carry for more than 3 second is

If a sinusoidal wave has frequency of 50 Hz with 30 A r.m.s. current which of the following equation represents this wave ?

All the rules and laws of D.C. circuit also apply to A.C. circuit containing

Form factor for a sine wave is

For the same peak value which of the following wave will ‘have the highest r.m.s. value ?

In an AC. circuit, a low value of kVAR compared with kW indicates

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