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Metal wire is connected in the left gap, Germanium is connected in the right gap of metre bridge and balancing point is found at 50 cm. Metal wire is heated and Germanium is cooled so that variations of resistances in them are equal. Then the balancing point

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will not shift

shifts towards left

shifts towards right

depends on change of temperature

answer is A.

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Detailed Solution

Since the variations in resistances are kept equal, Heating increases the resistance in the metal wire and also cooling increases the resistance in germanium making the resistances stay equal again. Therefore, the balancing point won't shift.

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