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n identical cells, each of emf E and int...

n identical cells, each of emf E and internal resistance r, are joined in series to form a closed circuit. Find the potential difference across any one cell.

A

E/n

B

E/nr

C

nE/r

D

0

Text Solution

Verified by Experts

The correct Answer is:
D
Current in the circuit is
`I = (nE)/(nr) = E/r`
The equivalent circuit of one cell is
shown in figure. Potential difference
across the cell is
`V_(A) - V_(B) = -E + ir= E + E/r.r = 0` .
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