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The storage battery of a car has an emf ...

The storage battery of a car has an emf of 12 V. If the internal resistance of the battery is 0.4`Omega`, what is the maximum current that can be drawn from the battery ?

Text Solution

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Here emf `epsi` = 12 V, internal resistance r = 0.4 `Omega ` .
The maximum current which can be drawn from the battery (in short circuit condition)
`I_(max) = epsi/r = (12)/(0.4) = 30 A`
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