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In the circuit shown Fig. when frequency...

In the circuit shown Fig. when frequency of supply is doubled, how should the values of L and C be changed so that glow in the bulb remains unchanged ?

Text Solution

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Current in RLC circuit is
`I_(v) = (E_(v))/(Z) = (E_(v))/(sqrt(R^(2) + (2 pi v L - (1)/(2 pi v C))^(2)`
The glow of bulb will remain unchanged when `I_(v)` remains constant. When v is doubled, L should be halved and C shoud also be halved.
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