n identical cells, each of emf `epsilon` and internal resistance r, are joined in series to from a closed circuit. One cell a is joined with reversed polarity. The potential difference across each cell, except A, is

Options

A. `(2 epsilon)/(n)`
B. `((n-1)/(n)) epsilon`
C. `((n-2)/(n)) epsilon`
D. `((2n)/(n -2)) epsilon`

Answer

A

Explanation

`i = ((n - 2)E)/(nr)`
`V = E - ir = E - ((n-2)E)/(nr).r = (2E)/(n)`.