Q. 14.2( 143 Votes )

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

Answer :

The diagram is given as:

Given: Electromotive force (E) of battery = 12V

Internal Resistance r of Battery = 0.4 Ω

Let the maximum current drawn from the battery be I.

Therefore, as per Ohm’s Law,

E = Ir

Hence maximum current drawn from battery is 30Ampere.

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