When a circuit is intended to be used as a heating thermostat, the operational amplifier must be connected in such a manner that a drop in temperature will produce a ____ at the output.
A) negative voltage
B) positive voltage
C) negative resistance
D) positive resistance

Question

When a circuit is intended to be used as a heating thermostat, the operational amplifier must be  connected in such a manner that a drop in temperature will produce a ____ at the output.
A) negative voltage
B) positive voltage
C) negative resistance
D) positive resistance

Quizplus · Accepted Answer

When a circuit is used as a heating thermostat, the operational amplifier is typically set up in a comparator configuration where the temperature is monitored through a sensor (like a thermistor). A drop in temperature would result in the operational amplifier outputting a positive voltage to activate the heating element, thereby increasing the temperature back to the desired level.

When a Circuit Is Intended to Be Used as a Heating