Assertion :A potentiometer having $10$ wires is more accurate than the potentiometer having $1$ wire Reason: Potential gradient of $10$ -wire potentiometer is much less

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Assertion is incorrect but Reason is correct

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
The potentiometer is an accurate instrument for measuring emf of a cell and potential between two points of an electric circuit. The potential gradient is the fall in the potential per unit length of the wire. The sensitivity of the potentiometer depends upon the potential gradient along the wire. The smaller potential gradient will give the greater sensitivity. Hence, on employing 10 wires potential gradient is reduced.
Ans A

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Assertion :A potentiometer having 10 wires is more accurate than the potentiometer having 1 wire Reason: Potential gradient of 10-wire potentiometer is much less

Assertion :A potentiometer having $10$ wires is more accurate than the potentiometer having $1$ wire Reason: Potential gradient of $10$ -wire potentiometer is much less