BEE Electric Circuit Analysis 2

Question 1

In a series RLC circuit at resonance, which statement is correct?

Accepted Answer

Impedance equals R only

Answer

At resonance, XL = XC, so they cancel and total impedance equals R alone.

Question 2

Thevenin's theorem states that any linear circuit can be replaced by a:

Accepted Answer

Voltage source in series with a resistance

Answer

Thevenin's theorem reduces any linear network to an equivalent voltage source (Vth) in series with a resistance (Rth).

Question 3

A capacitor of 100 μF is charged to 50 V. What is the energy stored?

Accepted Answer

0.125 J

Answer

Energy = ½CV² = ½ × 100×10⁻⁶ × 50² = 0.125 J.

Question 4

Which method uses node voltages as the primary unknowns to analyze a circuit?

Accepted Answer

Nodal analysis

Answer

Nodal analysis applies KCL at each node and solves for node voltages as the primary unknowns.

Question 5

In an RL circuit with DC supply, the time constant τ is:

Accepted Answer

L/R

Answer

The time constant of an RL circuit is τ = L/R, representing the time to reach ~63.2% of the final current.

BEE - Bachelor of Electrical Engineering Practice Test