प्रत्यावर्ती धारा (AC) या वोल्टेज में एक 'चक्र' (cycle) को इस प्रकार परिभाषित किया गया है:

An alternating voltage source of variable angular frequency ω and fixed amplitude V is connected in series with a capacitance C and an electric bulb of resistance R (zero inductance). When ω is increased, what happens to the brightness of the bulb?

An inductor of reactance 1 Ω and a resistor of 2 Ω are connected in series to the terminals of a 6 V (rms) AC source. The power dissipated in the circuit is:

How does the total impedance (Z) of a series resistor-capacitor (R-C) circuit change when the frequency (f) of the AC source is increased?

Which of the following circuits produces a unity power factor in an AC system?

Two AC circuits are connected to the same alternating voltage source. If the impedance of Circuit A is greater than that of Circuit B, how will the currents flowing through the two circuits compare?

Given below are two statements: an Assertion [As] and a Reason [R]. Assertion [As]: Alternating current (AC) is preferred over direct current (DC) for long-distance power transmission. Reason [R]: AC voltage can be stepped up or stepped down efficiently using transformers, reducing transmission energy losses. Choose the correct alternative:

When an alternating voltage v = Vm sin(ωt) is applied across a pure resistor, the expression for the current in the circuit is:

The form factor of a sinusoidal alternating waveform is defined as the ratio of its: