Question

With an external resistance of 1.0Ω, the difference in potential across the terminals of an accumulator is 1.5V; with an external resistance of 2Ω. the difference in potential increases to 2V. Find the electromotive force and the internal resistance of the accumulator.

Answer 1

Answer: r = 1 ohm; ε = 3V.

Explanation:

For the first case, Ohm's law gives the equations