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Wheatstone bridge is most sensitive when the arms ratio is

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zero

less than one

more than one

equal to one

answer is A.

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Detailed Solution

The Wheatstone bridge is said to be more sensitive when its voltmeter will be showing 0 deflection, which means it will be in a balanced condition, ie., all four arms are of nearly of the same order of magnitude. Hence the arms ratio should be 1.

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