RE-NEET 2024 Physics Wheatstone Bridge MCQ Question
The given circuit shows a uniform straight wire AB of 40 cm length fixed at both ends. In order to get zero reading in the galvanometer G, the free end of J is to be placed from B at:
32 cm
8 cm
16 cm
24 cm
Correct Answer
Detailed Explanation
To achieve zero reading in the galvanometer, the potential difference across the wire must be zero. This occurs when the wire is divided in the ratio of the resistances, which is 3:1, hence 24 cm from B.
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