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A potentiometer is used for the compaise...

A potentiometer is used for the compaisem of e.m.f. of two cells `E_(1)` and `E_(2)`. For cell `E_(1)` the no deflection point os obtained at `20 cm` and for `E_(2)` the no deflection point is obtained at `30 cm`. The ratio of their e.m.f.'s will be

A

`2//3`

B

`3//2`

C

1

D

2

Text Solution

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The correct Answer is:
A
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