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
