The Resistance of a Platinum Wire Is to Be Calibrated $\degree$

Multiple Choice

The resistance of a platinum wire is to be calibrated for low-temperature work.A platinum wire with resistance 1.000 W at 20 $\degree$ C is immersed in liquid nitrogen at 77 K (-196 $\degree$ C) .If the temperature response of the platinum wire is linear,what is the expected resistance of the platinum wire at -196 $\degree$ C? [a_platinum = 3.92x 10^-3 ( $\degree$ C) ^-1].

A) 0.153 W
B) 0.232 W
C) 1.768 W
D) 1.847 W