In the given circuit, no current is pass...

In the given circuit, no current is passing through the galvanometer. If the cross sectional diameter of the wire `AB` is doubled, then for null point of galvanometer, the value of `AC` would be:

A

`(x)/(4)`

B

`4x`

C

`2x`

D

`x`

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The correct Answer is:

D

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