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MHT CET 2025 (20 Apr, Shift 1) · Resonance, Bandwidth & Q Factor

Resonance, Bandwidth & Q Factor question from MHT CET 2025 (20 Apr, Shift 1)

Q26MHT CET 2025 · 20 APR · SHIFT 1Easy

Resonance, Bandwidth & Q Factor

A $20\ \Omega$ resistance, 10 mH inductance coil and $15\ \mu\text{F}$ capacitor are joined in series. When a suitable frequency alternating current source is joined to this combination, the circuit resonates. If the resistance is made $\frac{1}{3}\text{rd}$ , the resonant frequency

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Answer: (a)

$f_0 = \dfrac{1}{2\pi\sqrt{LC}}$ does not contain $R$ .
Changing $R$ only changes the peak current and sharpness, not $f_0$ .
So the answer is (a) remains unchanged.

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