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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