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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 I of the potentiometer wire. The e.m.f. E will be given by

A

`(E_0r1)/(r'r_1L)2`

B

`(E_0I)/L`

C

`(LE_0r)/((r'r_1)I)`

D

`(LE_0r)/(Ir_1)`

Text Solution

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The correct Answer is:
A
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