AIPMT PRELIMS 2006 Physics LC Circuits MCQ Question
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:
f/4
8f
f/2√2
2f
Correct Answer
Detailed Explanation
The frequency of oscillation is given by f = 1/(2π√(LC)). Doubling L and changing C to 4C results in the frequency being reduced by a factor of 4.
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