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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 of `0.4 Omega`, What is the maximum current that can be drawn from the battery ?

Text Solution

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Emf of the battery, `E = 12` V
Internal resistance of the battery, `r= 0.4 Omega`
Maximum current drawn from the battery `= I`
According the Ohm's law,
`E=Ir`
`I=(E)/(r)`
`= (12)/(0.4) = 30 A`
The maximum current drawn from the given battery is 30 A.
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Knowledge Check

  • The battery of a trunk has an emf of 24 V. If the internal resistance of the battery is 0.8Omega . What is the maximum current that can be drawn from the battery?

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