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A simple potentiometer circuit is shown...

A simple potentiometer circuit is shown in figure . The internal resistance of 4 V battery is negligble AC is the uniform wire of length 100 cm , and resistance ` 2 Omega` . What would be the length of AB for which galivanometer shows zero deflection .

A

`82.5 cm`

B

`41.50 cm`

C

`165 cm `

D

50 cm

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