Question

What is the internal resistance of an accumulator if with an external resistance of 1Ω it gives a current of 1A and with an external resistance of 2.5Ω. a current of 0.5A?

Answer 1

Explanation:

The current in the first case is related to the e.m.f. and the internal resistance of the accumulator by the equation

In the second case,

The e.m.f. and the internal resistance of the accumulator are determined by the solution of these equations.