Alternating Current (AC) Mock Tests

An AC voltage of 220 V (rms) at 50 Hz is applied across a series LCR circuit. At resonance, the rms current is 2.2 A. The power dissipated in the circuit is:

The power factor of an LCR series circuit at resonance is:

An AC source of voltage v = V₀ sin(100t) is connected across a pure inductor of inductance L = 0.1 H. The phase relationship between current and voltage is:

In an LCR series circuit at resonance, the impedance is:

In a series LCR circuit connected to an AC source, the resonant frequency is given by:

In a series LCR circuit, R = 100 Ω, L = 0.5 H, and C = 8 μF. The resonant frequency of the circuit is approximately:

An AC voltage v = 220 sin(1000t) V is applied across a capacitor of capacitance 10 μF. The peak current in the circuit is:

The power factor of a pure capacitive circuit is: