BEE Bachelor of Electrical Engineering Fundamental Circuit Analysis Questions and Answers

Question 1

According to Kirchhoff's Current Law (KCL), what is the fundamental principle governing the flow of current at any node (junction) in an electrical circuit?

Accepted Answer

The algebraic sum of currents entering and leaving the node is zero.

Answer

The total voltage at the node must be equal to the source voltage.

Answer

The current leaving the node is always greater than the current entering it.

Answer

The algebraic sum of resistances connected to the node is constant.

Question 2

In a DC circuit, a 10V source is connected to a series combination of a 3Ω resistor and a 2Ω resistor. What is the power dissipated by the 3Ω resistor?

Accepted Answer

12 W

Answer

18 W

Answer

30 W

Answer

50 W

Question 3

Which of the following statements is true regarding a capacitor in a DC circuit after it has been fully charged?

Accepted Answer

It acts as an open circuit.

Answer

It acts as a short circuit.

Answer

It continuously draws maximum current from the source.

Answer

Its voltage is zero.

Question 4

A circuit designer needs to find a simplified equivalent circuit for a complex linear network. The equivalent circuit should consist of a single voltage source and a single series resistor. Which theorem should be applied?

Accepted Answer

Thevenin's Theorem

Answer

Norton's Theorem

Answer

Superposition Theorem

Answer

Maximum Power Transfer Theorem

Question 5

For maximum power to be transferred from a DC voltage source with an internal resistance (Rs) to a connected load resistance (RL), what must be the relationship between the resistances?

Accepted Answer

RL must be equal to Rs.

Answer

RL must be significantly larger than Rs.

Answer

RL must be significantly smaller than Rs.

Answer

RL must be twice the value of Rs.

Question 6

In an AC circuit containing only a pure inductor, what is the phase relationship between the voltage across the inductor and the current flowing through it?

Accepted Answer

The voltage lags the current by 90 degrees.

Answer

The voltage and current are in phase.

Answer

The current lags the voltage by 90 degrees.

Answer

The voltage and current are 180 degrees out of phase.