Electrical Engg (EEE) - MCQ Practice Questions

In a series RLC circuit, the impedance Z is given by:

The power factor of an AC circuit is defined as:

For maximum power transfer in a DC circuit, the load resistance RL should be equal to:

In a purely resistive AC circuit, the phase difference between voltage and current is:

The resonant frequency of a series RLC circuit is given by:

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:

For a node in a circuit applying Kirchhoff's Current Law (KCL), the sum of currents entering equals:

A bridge circuit is balanced when:

In a purely inductive circuit, the current lags the voltage by:

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:

An ideal voltage source has internal resistance of:

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: