Which one of the following is a non-linear resistive device?
A. Panel mounting resistor
B. Light dependent resistor
C. Present resistor
D. Fixed resistor.
Best answer B. It's usually a Cad Sulfide Cell. R non linear with light intensity
panel Mounting resistor: Audio taper Potentiometer. Non linear with respect to rotation. But, it's probably a fixed chassis mount resistor. Panel Mounting resistors don''t really exist.
Trouble is KISS the panel mount resistor could easily be a logarithmic pot!! BUT an LDR is non linear always. (I hate these badly asked questions, I never got these kind of questions when I was at college)