Discussion
In which of the following resistors does the value of resistance decrease nonlinearly with increase in temperature?
Answer: B
A negative temperature coefficient (NTC) resistor, such as a thermistor, has a resistance that falls as its temperature rises, and the fall is non-linear, roughly exponential. Positive temperature coefficient resistors increase their resistance with temperature, voltage dependent resistors change their resistance with the applied voltage, and light dependent resistors change it with the illumination. So the answer is Negative temperature co-efficient resistors, option (B).
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