Question

Consider the following statements regarding Thermistor

1. It has a high sensitivity

2. It has a linear relationship with temperature 

3. It is a resistive device.

4. It can be used as a time-delay device.

Which of the above statements are correct ?
1. 1, 2, 3 and 4
2. 2, 3 and 4 only
3. 1, 3 and 4 only
4. 1, 2 and 3 only

Answer 1

Correct Answer - Option 3 : 1, 3 and 4 only

1. Thermistor is used for the measurement of temperature

2. It is a kind of resistor whose resistivity depends on surrounding temperature

3. It is made of semiconductor material that means its resistance lies between the conductor and the insulator

4. A thermistor is highly sensitive as compared with a platinum resistance thermometer

5. The resistance of a thermistor is solely a function of its absolute temperature irrespective of the source of heat. Thermistors doesn’t have linear resistance temperature characteristics. 

6. Most thermistors exhibit negative resistance temperature co-efficient. 

7. The response time of a thermistor can vary from a fraction of a second to minutes, depending on the size of the detecting mass and capacity of the thermistor.