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A potentiometer wire of Length L and a r...

A potentiometer wire of Length `L` and a resistance `r` are connected in series with a battery of e.m.f. `E_(0)` and a resistance `r_(1)`. An unknown e.m.f. `E` is balanced at a length `l` of the potentiometer wire. The e.m.f. `E` will be given by :

A

`(LE_(0)r)/(lir_(1))`

B

`(E_(0)r)/((r+r_(1))).(l)/(L)`

C

`(E_(0)l)/(L)`

D

`(LE_(0)r)/((r+r_(1))l)`

Text Solution

Verified by Experts

The correct Answer is:
B
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