In the given circuit, no current is passing through the galvanometer. If the cross-sectional dia...

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In the given circuit, no current is passing through the galvanometer. If the cross-sectional diameter of the wire \( A B \) is doubled, then for null point of galvanometer, the value of \( A C \) would be:
(A) \( 2 X \) [IIT-JEE(Scr.) 2003, 3/84]
(C) \( \frac{X}{2} \)
(B) \( X \)
(D) None of these
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