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A potentiometer wire AB having length L ...

A potentiometer wire AB having length L and resistance 12 r is joined to a cell D of emf `epsi//2` and internal resistance 3r is connected. The length AJ at which the galvanometer as shown in fig. Shows no deflection is :

A

`13/24 L`

B

`11/12 L`

C

`11/24 L`

D

`5/12 L`

Text Solution

Verified by Experts

`i=E/(13r) , E/2=e-jR_x`
`=E-e/(13r) times (x/L times 12r),1/2=12/13 x/L implies x=13/24 L`
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