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MHT CET Physics question

PhysicsElectromagnetic InductionMHT CET

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

Answer: (A)

Solution

and , so ; f/2 and

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Question ID VK-082091