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A thermistor is used for ____________

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A thermistor is used for ____________

(a) Over voltage protection

(b) Temperature alarm circuit

(c) Automatic light control

(d) Automatic sensor

I got this question in semester exam.

My enquiry is from Advanced Problems on Filters topic in section Filters and Attenuators of Network Theory

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Right answer is (b) Temperature alarm circuit

Easiest explanation: The resistance of a thermistor decreases with increases in temperature. It is used to monitor the hot spot temperature of electric machines.

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