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A coil a capacitor and an AC source of r...

A coil a capacitor and an `AC` source of rms voltage `24 V` are connected in series. By varying the frequency of the source, a maximum rms current of 6 A is observed. If coil is connected is at DC batteryof emf 12 volt and internal resistance `4Omega`, then current through it in steady state is

A

2.4 A

B

1.8 A

C

1.5 A

D

1.2 A

Text Solution

Verified by Experts

The correct Answer is:
C
Let R be the resistace of coil + capacitor . Then,
R = 24/6 = 4`Omega`
In this second case ,
`implies` `underset(rms)(I)` = 12 / 4 + 4 = 12/8 = 1.5 A
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