By What Factor Is the Resistance of a Copper Wire $\degree$

question 78

Multiple Choice

By what factor is the resistance of a copper wire changed when its temperature is increased from 20 $\degree$ C to 120 $\degree$ C? The temperature coefficient of resistivity for copper = 3.9 x 10^-3 ( $\degree$ C) ^-1.

• A)0.72
• B)1.06
• C)1.39
• D)1.44