Question

What is the e.m.f. of the accumulator in if a current of 0.08 A flows to the external circuit from the negative terminal of the accumulator to the positive terminal when it is connected in opposition to the standard cell? 

Answer 1

Explanation:

It should be noted that when the accumulator is connected in opposition to the standard cell, the current and e.m.f. of the accumulator will be of different sign, and the equation for Ohm's law, in this case, has the form

I1R = ε₂ - ε₁.