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In a metre-bridge when a resistance in the left gap is and unknown resistance in the right gap, the balance length is found to be On shunting the unknown resistance with the balance length changes by:
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Verified Answer
The correct answer is:
In first circuit:
For balanced condition, we get
In second case:
Net resistance of the right side due to shunting becomes,
Again for balanced condition,
Clearly, balance length changes by .
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