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Question

Which of the following methods does not help to minimize the error due to contact resistance in Wheatstone's meter bridge experiment:


A
The wire used must be uniform
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B
The wire used must be non-uniform
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C
Null point is obtained near the middle of the wire
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D
Interchange the positions of unknown resistance (X) and known resistance(R)
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Solution

The correct option is B The wire used must be non-uniform
Non-uniform wires leads to increased error in the measurement of resistance in wheatstone's bridge experiment.

Physics

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