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At what temperature will aluminum have a resistivity that is two times the resistivity of copper...

At what temperature will aluminum have a resistivity that is two times the resistivity of copper at room temperature?

The answer is 72.74 degrees Celsius but I am not sure how to get to that answer. Assume room temp is 20 degrees celsius.

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Answer #1

Answer :

At 72.6 oC aluminum have a resistivity that is two times the resistivity of copper at room temperature.

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Here resistivity of Aluminum at 20 oC, = 2.65 x 10-8 Ohm-meter

= temperature coefficient of Aluminum = 0.0039 oC-1

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