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A resistance of 100 Omega, a coil induct...

A resistance of `100 Omega`, a coil inductance 5 mH and a capacitor of `10 muF` are joined in series. When this L-C-R circuit is joined to a suitable frequency a.c., the circuit resonates. What is the effect on the resonant frequency, if the resistance is made `50 Omega`?

A

It is halved

B

it is doubled

C

it does not change

D

it is tripled

Text Solution

Verified by Experts

The correct Answer is:
C
The resnant frequency, `f = 1/(2pisqrt(LC))`
It does not depend upon the value of the resistance. Hence f will remain the same, evem if R is made `50 Omega or 200 Omega`.
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