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Two cells of emf's E(1) and E(2) when pl...

Two cells of emf's `E_(1)` and `E_(2)` when placed in series produce null deflection at a distance of 204 cm in a potentio meter. When one cell is reversed they produce null deflection at 36 cm if `E_(1)` 1.4v then `E_(2)=`

A

`0.98` V

B

`2.47 V`

C

`0.098` V

D

98.8` V

Text Solution

Verified by Experts

The correct Answer is:
A
`E_(1)/E_(2) = (l_(1) + l_(2))/(l_(1)-l_(2))`
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