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NEET 2006 (AIPMT) · LC Oscillations

LC Oscillations question from NEET 2006 (AIPMT)

Q24NEET 2006 · AIPMTEasy

LC Oscillations

A transistor-oscillator using a resonant circuit with an inductor L (of negligible resistance) and a capacitor C in series produce oscillations of frequency $f$ . If L is doubled and C is changed to 4C, the frequency will be

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Answer: (d)

$f = \frac{1}{2\pi\sqrt{LC}}$
$L\to 2L$ , $C\to 4C$ : $LC \to 8LC$
$f' = \frac{f}{\sqrt{8}} = \frac{f}{2\sqrt{2}}$ , so the answer is (d).

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