7. A copper wire has a resistance of 4.75  at room temperature. What is the...

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Question

7. A copper wire has a resistance of 4.75  at room temperature. What is the wire’s resistance at 86.4 °C?

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Answer 1

Answer #1

Thermal conducticity coefficient of Copper ,

a = 3.9 *10^-3 1/degree C

Now, at 86.4 degree

wire's resistance = 4.75 * (1 + 3.9 *10^-3 * (86.4 - 20))

wire's resistance = 5.98 Ohm

the wire's resistance is 5.98 Ohm

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Answer 2

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