Question: A copper wire has a 25-m resistance at 20oC. When the wire is carrying a current, heat produced by the current causes the temperature of

A copper wire has a 25-mΩ resistance at 20oC. When the wire is carrying a current, heat produced by the current causes the temperature of the wire to increase by 20oC.
(a) What is the change in the wire’s resistance?
(b) If its original current was 10.0 mA, what is its final current?

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