Welcome to your AC Circuits MCQ practice assessment.

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

The peak value of a sine wave is 200 V. Its average value 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

If two sine waves of the same frequency have a phase difference of JT radians, then

Capacitive reactance is more when

Inductance affects the direct current flow

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

. If two sinusoids of the same frequency but of different amplitudes and phase angles are subtracted, the resultant is

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

For a frequency of 200 Hz, the time period will be

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

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

The form factor is the ratio of

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

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

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

The period of a sine wave is _50 milli seconds. Its frequency is

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

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