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An inductor-coil , a capacitor and an AC...

An inductor-coil , a capacitor and an AC source of rms voltage `24 V` are connected in series. When the frequency of the source is varied, a maximum rms current of `6.0 A` is observed. If this inductor coil is connected to a battery of `emf 12 V` and internal resistance `4.0 Omega`, what will be the current?

A

`2 A`

B

`1.5 A`

C

`0.5 A`

D

`2.5 A`

Text Solution

Verified by Experts

The correct Answer is:
B
Initially at resonance `6 = (24)/(R )`
`:.` Resistance of coil `R = 4 Omega`
Later with `12 V` battery `i = (12)/(R + r) = (12)/(4 + 4) = 1.5 A`
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