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In the given figure , a series L-C-R cir...

In the given figure , a series L-C-R circuit is connected to a variable frequency source of 230 V . The impedance and amplitude of the current at the resonating frequency will be

A

`20 Omega` and 4.2 A

B

`30 Omega` and 6.9 A

C

`25 Omega` and 5.8 A

D

`40 Omega` and 5.75 A

Text Solution

Verified by Experts

The correct Answer is:
D
At resonance ,
`underset(L)(X)` = `underset(C )(X)`
`therefore` Z = R = 40`Omega`
`underset(rms)(I)` = `underset(rms)(V)` / Z = 5.75 A
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