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?

Question

Philoid · Accepted 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.