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NEET 2006 Physics question

PhysicsElectromagnetic InductionNEET 2006

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:-

Answer: (3)

Solution

Frequency of an LC oscillator: . New frequency: \frac{1}{2π\sqrt{(2L)(4C)}}\frac{1}{2π\sqrt{8}\sqrt{LC}}$ =

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Question ID VK-089543