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 $Q$ factor, the bandwidth will

Increase

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Decrease

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Remain the same

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Be less selective

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Solution

The correct option is B Decrease
$Q$ factor or quality factor is related as
$Q = \frac{F_{r}}{B_{w}}$
$B_{w}$ = Bandwidth
$F_{r}$ = Resonance Frequency
as $Q$ increases, $B_{w}$ decreases.

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