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Statement-1: In a metre bridge experiment, it is advisable to repeat the experiment until the null point (balance point) is obtained near the midpoint of the wire. Statement-2: The metre bridge experiment is based on the principle of the Wheatstone bridge.

1. Statement-1 is True, Statement-2 is True; Statement-2 is a correct explanation for Statement-1.
2. Statement-1 is True, Statement-2 is True; Statement-2 is NOT a correct explanation for Statement-1.
3. Statement-1 is True, Statement-2 is False.
4. Statement-1 is False, Statement-2 is True.

Correct answer: Statement-1 is True, Statement-2 is True; Statement-2 is NOT a correct explanation for Statement-1.

Solution

Statement-1 is true: a null point near the midpoint ensures the resistance per unit length is uniform and the measurement error is minimized. Statement-2 is also true: the metre bridge uses Wheatstone bridge principle. However, Statement-2 does not explain Statement-1 — the midpoint preference is a practical accuracy consideration, not a consequence of Wheatstone's principle.

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