Question

A potential divider is used to given outputs of 2V and 3V form a 5V source, as shown in fig.

Which combination of resistance `R_1, R_2, and R_3` gives the correct voltages?
A. 2
B. 2
C. 2
D. 3

Answer 1

Correct Answer - B
For cell A, the current I flows opposite to the direction of its
emf.
Potential difference is `epsilon + ir = epsilon +((n -2)epsilon)/(nr)r`
`=epsilon[1+(n - 2)/(n)] =epsilon((2n-2)/(n))`