In an RLC circuit, what happens to the impedance at resonance? (2023)

₹0.0

Question: In an RLC circuit, what happens to the impedance at resonance? (2023)

Options:

Correct Answer: Minimum

Exam Year: 2023

Solution:

At resonance, the impedance in an RLC circuit is at a minimum.

In an RLC circuit, what happens to the impedance at resonance? (2023)

In an RLC circuit, what happens to the impedance at resonance? (2023)

Step 1: Understand what an RLC circuit is. It consists of a resistor (R), inductor (L), and capacitor (C) connected together.
Step 2: Know what impedance means. Impedance is the total opposition to the flow of current in the circuit.
Step 3: Learn about resonance. Resonance occurs in an RLC circuit when the frequency of the source matches the natural frequency of the circuit.
Step 4: At resonance, the inductive reactance (opposition from the inductor) and capacitive reactance (opposition from the capacitor) cancel each other out.
Step 5: When the inductive and capacitive reactances cancel, the total impedance is only due to the resistor.
Step 6: Since the resistance is usually lower than the combined reactance, the overall impedance is at its minimum value at resonance.

Impedance in RLC Circuits – At resonance, the inductive and capacitive reactances cancel each other out, resulting in the minimum impedance, which is purely resistive.