Correct Answer - Option 4 : Thermistor
- Thermistor has a very high-temperature coefficient of resistance compared to the transistor, varistor, thyristor.
- The thermistor is a resistance thermometer i.e. its resistance depends on the temperature.
Note:
Temperature coefficient of resistance of electronic devices is measured as the change in electrical resistance per degree of temperature change
Rt = R0 (1 ± αt)
Where,
Rt = Resistance at temp t°C
R0 = Resistance at 0°C temp
α = temperature constant.
