Thermistor is certainly not binary but a transistor can operate either in the digital or analog domain. So d seems the best answer if only one answer is correct.
My guess is that this is a typical homework question which is just testing that the student listened in class, not that they are actually thinking about it.
Seems like the items that can either be on or off qualify...
Thermistor's resistance *varies* with temp doesn't it? Transistors can be used to build binary logic circuits but they inherently operate at a range of current/voltage values.
Relays and switches can be single throw or double throw (or if it is a rotary switch...) It seems to me the device that is inherently binary (or trinary, or n-ary) would be switches and relays.
I have always hated questions like these. Where the prof thinks he is so friggin clever but in reality his question just plain sucks. There's no way you can claim that a transistor is by nature binary.
I have always hated questions like these. Where the prof thinks he is so friggin clever but in reality his question just plain sucks. There's no way you can claim that a transistor is by nature binary.
A lot of teachers know absolutely nothing about electronics, so it's not surprising - the number of questions you get which have no actual answer (or more than one answer) has always been a problem.