Two cells of emfs E1 and E2 and internal resistances 𝑟ଵand 𝑟ଶ respectively are connected in parallel as shown in the figure. Deduce the expression for the

Question 18:Two cells of emfs E1 and E2 and internal resistances 𝑟ଵand 𝑟ଶ respectively are connected in parallel as shown in the figure. Deduce the expression for the

(i) equivalent emf of the combination
(ii) equivalent internal resistance of the combination
(iii) potential difference between the points A and B.

The correct answer is -Here, I = I1 + I2 …(i)
Let V = Potential difference between A and B.
For cell 1

(iii) The potential difference between A and B
V Ir    eq eq