A certain series resonant circuit has a bandwidth of $2 k H z$ . If the existing coil is replaced with one having a higher value of $Q$ , the bandwidth will

Increase

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Remain the same

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Decrease

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Solution

The correct option is C Decrease
We know,
$B w = \frac{F}{Q}$
When Q increase, the bandwidth decreases.
Hence, when a certain series resonant circuit has a bandwidth of $2 k H z$ . If the existing coil is replaced with one having a higher value of Q, the bandwidth will decrease.

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