Correct Answer - Option 4 : All of the above
A thermistor (or thermal resistor) is defined as a type of resistor whose electrical resistance varies with changes in temperature.
Thermistors have a variety of applications. They are widely used as a way to measure temperature as a thermistor thermometer in many different liquid and ambient air environments.
- Digital thermometers (thermostats)
- Automotive applications (to measure oil and coolant temperatures in cars & trucks)
- Household appliances (like microwaves, fridges, and ovens)
- Circuit protection (i.e. surge protection)
- Vacuum measurements
- Measurement of the composition of gases
- Rechargeable batteries (ensure the correct battery temperature is maintained)
- To measure the thermal conductivity of electrical materials
- To measure the percent of CO2 in air
- Temperature compensation (i.e. maintain resistance to compensate for effects caused by changes in temperature in another part of the circuit)
- Used in Wheatstone bridge circuits
