Question
The storage battery of a car has an emf of 12 V. If the internal resistance of the battery is 0.4 Ω , what is the maximum current that can be drawn from the battery?
Solution
Maximum current is drawn from a battery when the external resistance in the circuit is zero i.e., R = 0.
Given,
E.m.f of the battery,
Internal resistamce of the battery,
Therefore, using the formula for maximum current drawn we get,
Given,
E.m.f of the battery,
Internal resistamce of the battery,
Therefore, using the formula for maximum current drawn we get,
