- #1
palkia
- 52
- 2
Homework Statement
Two cells of same emf E and different internal resistance r1 and r2 are connected in series to an external resistance R.The value of R for which the potential difference across the first cell is zero is given by
(A) R=r1/r2
(B)R=r1+r2
(C)R=r1-r2
(D)R=r1r2
Homework Equations
E=IR[/B]
The Attempt at a Solution
I first founded the total current in the circuit which came to be-E/R+r1+r2 then used the equation Ir1 to get the potential difference but I am not getting my answer[/B]