Question

Two cells A and B each of e.m.f. 2 volt, are connected in series to an external resistance R = 1 ohm. If the internal resistance of the cell is 1.9 ohm and that of battery B is 0.9 ohm. What is the potential difference across the terminals of cell A

(1)  2.0 volt

(2)   3.8 volt

(3)   1.90 volt

(4)   2.5 volt

Answer 1

Correct option  (1)  2.0 volt

Explanation:

Cell A is in open circuit

So potential difference across the terminal = E.M.F = 2 V