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Q.

During the experiment to determine the resistivity of a wire by a meter bridge, the jockey is moved gently along the wire from left to right to

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a

find a deflection in the galvanometer towards left

b

 find a deflection in the galvanometer towards right 

c

 find no deflection in the galvanometer 

d

 find a maximum deflection in the galvanometer 

answer is C.

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Detailed Solution

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The jockey is moved so as to get the null point (i.e., no deflection in the galvanometer).

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During the experiment to determine the resistivity of a wire by a meter bridge, the jockey is moved gently along the wire from left to right to