Question

The LCR circuit becomes extremely sharp in resonance when:

• A. \( R \) is large
• B. \( L \) is large
• C. \( C \) is large
• D. \( R \) is small

Hint:

In an LCR circuit, resonance is sharpest when the resistance is minimal, allowing the current to oscillate with maximum amplitude.

Answer 1

The Correct Option is D

Step 1: Understanding resonance in LCR circuits. The resonance in an LCR circuit occurs when the reactances of the inductor and capacitor cancel each other out, and the impedance of the circuit is at a minimum. This results in the sharpest resonance when the resistance \( R \) is small.
Step 2: Conclusion. Thus, the resonance is sharpest when \( R \) is small.