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## Homework Statement

A 10 ohms Nichrome resistor is wired into an electronic circuit using copper leads (wires) of diameter 0.6 mm with a total length of 50 cm. The additional resistance is due to the copper leads is 0.03 ohms.

What change in temperature would produce a change in resistance of the Nichrome-wire equal to the resistance of the copper leads?

## Homework Equations

RCu = 0.03[1 + aCu(tC – 20)]= change in Rw = 10aw(tC – 20); solve for tC

aCu at 20 degree C= 3.9 x 10^-3

aw at 20 degree C = 4.3 x 10^-3

## The Attempt at a Solution

0.03[1 + aCu(tC – 20)] = 10aw(tC – 20)

I solved for tc and got 30.6 C but it is not the right answer so please help.