List of top Electrical Engineering Questions on AC Circuits

Lissajous patterns on a CRO are used to measure

In a CRO, focusing of the electron beam is done by

The instrument used to measure power factor directly is

In a three-phase balanced system, the phase difference between any two phases is

In star connection, line voltage is related to phase voltage as

In delta connection, line current is related to phase current as

At resonance in a series RLC circuit, current is

The resonant frequency of a series RLC circuit is

The form factor of a sinusoidal alternating current is

The peak factor of a sinusoidal alternating current is

The average value of a sinusoidal alternating current over one complete cycle is

The RMS value of a sinusoidal alternating current is

The average value of sinusoidal alternating current over half cycle is

In a purely inductive circuit, current

In a purely capacitive circuit, current

The power factor of a purely resistive AC circuit is

The power factor of a purely inductive circuit is

The power factor of a purely capacitive circuit is

At resonance in a series RLC circuit, the impedance is

The unit of inductance is

Energy stored in an inductor is given by

The opposition offered by an inductor to alternating current is called

The opposition offered by a capacitor to alternating current is called