Question

A Nichrome wire is used as a heating element in a toaster. From the
moment the toaster is first
turned on to the moment the wire reaches it maximum temperature,
the current in the wire drops
by 20% from its initial value. What is the temperature change in
the wire? The temperature
coefficient for Nichrome is � = 0.0004 (�C)-1.
A) 200�C B) 400�C C) 300�C D) 500oC E) 100�C