Assertion :Heater wire must have high resistance and high melting point. Reason: If resistance is high, the electric conductivity will be 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 B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
Heater wire must have high resistance and high melting point, because in series current remains same, therefore according to Joule's law $H = I^{2} R t$ , heat produced is high if R is high. Melting point must be high, so that wire may not melt with increase in temperature.

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