CET Circuit Theory and Analysis 3

Question 1

Kirchhoff's Voltage Law (KVL) is based on the principle of conservation of:

Accepted Answer

Energy

Answer

KVL states the algebraic sum of voltages around any closed loop is zero, which is a consequence of conservation of energy.

Question 2

The Q factor of a series resonant circuit is best described as the ratio of:

Accepted Answer

Reactance to resistance at resonance

Answer

Q = XL/R (or XC/R) at resonance, representing how selective or sharp the resonant peak is.

Question 3

In mesh analysis, a mesh current is assumed to flow:

Accepted Answer

Around a single loop (mesh) in one direction

Answer

Mesh analysis assigns a circulating current to each independent loop (mesh) and writes KVL equations for each.

Question 4

A purely capacitive circuit has a phase relationship where current:

Accepted Answer

Leads voltage by 90°

Answer

In a purely capacitive circuit, current leads the voltage by 90° because the capacitor charges in response to voltage changes.

Question 5

Norton's equivalent current (IN) is found by:

Accepted Answer

Short-circuiting the load terminals and calculating current

Answer

Norton current is the short-circuit current that flows through the terminals when they are directly connected (shorted).

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