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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 this coil is connected to a battery of emf 12 V and internal resistance `4Omega` , the maximum current through it will be

A

`2.4A`

B

`1.8A`

C

`1.5A`

D

`1.2A`

Text Solution

Verified by Experts

The correct Answer is:
C
`I_max=V/R` (at resonance)
`6=24/R`
`:. R=4Omega`
`I_(DC)=V/(R+r)=12/(4+4)=1.5A`
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