Electrical Engg (EEE) - MCQ Practice Questions

A 10 Ω resistor and a 0.1 H inductor are connected in series to a 230V, 50Hz AC supply. The impedance of the circuit is approximately:

In a parallel RC circuit, the total admittance Y is given by:

The Q-factor (quality factor) of a resonant circuit is defined as:

In Thevenin's theorem, the Thevenin equivalent voltage (VTh) is found by:

A capacitor and inductor are in series with resonance occurring at 100 Hz. If L = 25 mH, the capacitance C is approximately:

A bridge circuit is balanced when:

The bandwidth of a resonant circuit is related to Q-factor by:

In a delta-wye (Δ-Y) conversion, if the delta resistances are RA, RB, RC, the wye resistance R1 (between node 1 and star point) is:

In a series RLC circuit at resonance, the impedance is:

The equivalent resistance of two resistors in parallel is always:

In Norton's theorem, the Norton equivalent current (IN) is found by:

The voltage regulation of a source is defined as:

A resistor of 10 Ω is connected in series with an inductor of 0.1 H across a 50 Hz AC supply. What is the impedance of the circuit?

What is the power factor of a circuit with impedance Z = 8 + j6 Ω?

In a purely capacitive circuit with V = 100V (RMS) and C = 50 μF at 50 Hz, what is the capacitive reactance?

What happens to the impedance of a series RLC circuit when frequency approaches resonant frequency?

The Q-factor of a resonant circuit is defined as:

A 50 Ω transmission line has a velocity factor of 0.67. What is the wavelength at 1 GHz?

The instantaneous power in an AC circuit is given by:

A circuit has resistance R = 8 Ω and reactance X = 6 Ω (inductive). If the apparent power is 100 VA, what is the real power?