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22 December, 22:34

To what value would you have to raise the temperature of a copper wire (originally at 20 ∘C) to increase its resistance by 14 %?

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  1. 23 December, 00:49
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    55.62 °C increase in temperature

    Explanation:

    Copper has a Temperature Coefficient of at near room temperature of + 0.393 percent per degree C increase in temperature.

    Hence to increase the resistance by 14 % =

    14/0.393 = 35.62 °C increase in temperature

    That is if the temperature increases 35.62 °C, the resistance will increase 0.393%*35.62 or 14 %.

    Hence the new temperature will be 35.62 + 20 = 55.62 °C
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