In a series RLC circuit, what happens to the current when the circuit is at reso

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Question: In a series RLC circuit, what happens to the current when the circuit is at resonance? (2021)

Options:

Correct Answer: It is maximum

Exam Year: 2021

Solution:

At resonance in a series RLC circuit, the impedance is minimum, and thus the current is maximum.

In a series RLC circuit, what happens to the current when the circuit is at resonance? (2021)

In a series RLC circuit, what happens to the current when the circuit is at resonance? (2021)

Step 1: Understand what a series RLC circuit is. It consists of a resistor (R), an inductor (L), and a capacitor (C) connected in a single loop.
Step 2: Know what resonance means. Resonance occurs when the inductive reactance (XL) and capacitive reactance (XC) are equal.
Step 3: At resonance, the total impedance (Z) of the circuit is at its minimum value because the inductive and capacitive effects cancel each other out.
Step 4: Since impedance is low, it allows more current to flow through the circuit.
Step 5: Therefore, at resonance, the current in the circuit reaches its maximum value.

Resonance in RLC Circuits – At resonance, the inductive and capacitive reactances cancel each other out, resulting in minimum impedance.
Impedance and Current Relationship – Ohm's Law states that current is inversely proportional to impedance; thus, minimum impedance leads to maximum current.