Electrical Engg (EEE) - MCQ Practice Questions

In maximum power transfer theorem, the load resistance should be:

A sinusoidal voltage v(t) = 300sin(100πt) V is applied to a 50 Ω resistor. What is the average power dissipated?

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

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?

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?

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

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?

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?

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

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

A network has 8 branches and 5 nodes. The number of independent mesh equations required is:

For maximum power transfer to a load from a source with Thevenin equivalent (Vth, Rth), the load resistance should be:

In a planar circuit, the relationship between number of nodes (n), branches (b), and independent loops (m) is:

The reciprocity theorem states that in a linear bilateral network:

In a circuit, the star-delta transformation is used to:

In mesh analysis, if a circuit has dependent sources, the approach is:

The Norton equivalent of a network is found by:

In a circuit with mutual inductance between two coils, the coupling coefficient k is defined as:

In a magnetically coupled circuit with two inductors L₁ and L₂ with mutual inductance M, if current increases in primary, the induced voltage in secondary opposes this change. This demonstrates: