Alternating Current Mock Tests

In an AC circuit, the power factor is unity when:

An AC voltage V = 100 sin(1000t) is applied across a series combination of R = 1 kΩ and C = 1 μF. The phase angle between the current and the voltage is:

An alternating emf E = E₀ sin(100t) is applied to a pure inductor. Angular frequency and inductive reactance are:

An AC source of voltage V = V₀ sin(100t) is connected across a pure capacitor of capacitance C = 10 μF. The current in the circuit:

An AC source of voltage V = V₀ sin(100t) is connected across a pure capacitor of capacitance C = 10 μF. The phase relationship between the current and voltage is:

An AC source of 220 V (RMS), frequency 50 Hz is connected to a resistor of 100 Ω. The RMS current in the circuit is:

A transformer has 500 primary turns and 5000 secondary turns. If the primary voltage is 200 V (AC), the secondary voltage is:

In an AC circuit, the voltage is given by V = 200 sin(100t) volts and the current is I = 200 sin(100t + π/3) amperes. The power factor of the circuit is: