Electrical Engg (EEE) - MCQ Practice Questions

What is the relationship between source voltage (Vs), terminal voltage (Vt), and current (I) in a real voltage source with internal resistance r?

For a series RLC circuit with R = 10 Ω, L = 0.1 H, C = 100 μF at resonance, what is the resonant frequency?

In a DC circuit, a 12V battery is connected to a resistor network. Using Thevenin's theorem, what is the Thevenin equivalent voltage (Vth) across terminals A and B if the open circuit voltage is measured as 8V?

Which of the following statements about Kirchhoff's Voltage Law (KVL) is correct?

A network has two meshes with currents I₁ = 3A and I₂ = 2A. The mutual inductance between the coils is 0.5H. What is the mutual inductance voltage in the first coil due to current change in the second coil at dI₂/dt = 4 A/s?

In a bridge circuit (Wheatstone bridge), for the bridge to be balanced, which condition must be satisfied?

A parallel RC circuit is connected to a 100V AC source at 50Hz. If R = 20Ω and C = 100μF, what is the total impedance of the circuit?

Using superposition theorem for a circuit with two voltage sources V₁ = 10V and V₂ = 5V connected in series with a 10Ω resistor, what is the current when considering only V₁?

In a RL series circuit with R = 15Ω and L = 0.3H connected to 230V, 50Hz supply, what is the power factor?

What is the Norton equivalent current (In) for a circuit where the short-circuit current between terminals A and B is 5A?

In a three-phase balanced circuit with line voltage VL = 440V, what is the phase voltage (Vph) in star connection?

A capacitor with capacitance C = 50μF is charged to 200V. What is the energy stored in the capacitor?

In mesh current analysis for a two-mesh circuit with self-resistances R₁ = 10Ω, R₂ = 15Ω and mutual resistance Rm = 5Ω, and voltages V₁ = 20V, V₂ = 0V, what would be the mesh impedance matrix determinant?

A 100Ω resistor is connected across a 50V DC source. What is the power dissipated?

In delta-to-star transformation, if delta resistances are Ra = 30Ω, Rb = 40Ω, Rc = 50Ω, what is the star resistance R₁ (connected to point corresponding to Ra)?

A series RLC circuit has R = 20Ω, L = 0.2H, C = 100μF at resonant frequency. What is the resonant frequency?

In a circuit with two parallel resistors R₁ = 6Ω and R₂ = 12Ω, what is the equivalent resistance?

A coil has resistance R = 50Ω and inductance L = 0.5H. When connected to 230V, 50Hz supply, what is the impedance?

In a circuit analysis problem, the voltage across a 5Ω resistor is measured as 25V. Using Ohm's law, what is the current through the resistor?

What is the reactive power in an AC circuit with apparent power S = 1000VA and power factor = 0.8?