A device that doesn't obey Ohm's law is a
A) light bulb.
B) tungsten wire.
C) copper wire.
D) silver bar.
E) resistor.

Question

Quizplus · Accepted Answer

A light bulb does not obey Ohm's law because its resistance changes significantly with temperature. When the filament heats up, its resistance increases, which is not consistent with Ohm's law that states the current through a conductor between two points is directly proportional to the voltage across the two points.

A Device That Doesn't Obey Ohm's Law Is a