In the shown arrangement of the experiment of the meter bridge if AC corresponding to null deflection of galvanometer is x, what would be its value if the radius of the wire AB is doubled :-
A
x
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B
x4
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C
4x
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D
2x
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Solution
The correct option is A x At null condition, R1R2=x100−x Thus, null condition is independent of radius of AB wire. So when radius is doubled, null position will remain same i.e x