Assertion :The coil in the resistance boxes are made by doubling the wire. Reason: Thick wire is required in resistance box.

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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Both Assertion and Reason are incorrect

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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
Resistance box. : an instrument for measuring and comparing electrical resistances.
Resistance increases with length which means we need longer wire for high valued resistance. That's why to use the unoccupied space for increasing range of resistance, wires are doubled and then coiled. This helps to have almost double resistance at same physical space.
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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