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Two cells when connected in series are b...

Two cells when connected in series are balanced on `8 m` on a potentiometer. If cells are connected with polarities of one the cell reversed, they balance on `2 m`. The ratio of e.m.f.'s of the two cells

A

`3 : 5`

B

`5 : 3`

C

`3 : 4`

D

`4 : 4`

Text Solution

Verified by Experts

The correct Answer is:
B
(b) `(E_(1))/(E_(2)) = (l_(1) + l_(2))/(l_(1) - l_(2)) = ((8 + 2))/((8 - 2)) = (5)/(3)`
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