A-LEVEL Physics: 5.2.2: Resistance in a Thermistor (SaveMyExams)

Question 1

All Solids are Made Up of ___ ___. The Higher the Temperature, the Faster these ___ ___.

Answer 1

Vibrating Atoms. Atoms Vibrate.

Question 2

When Current Flows Through a Material, the Electrons Collide with the Vibrating Atoms, which Obstruct their Flow. Hence, the Current ___, & the Resistance ___.

Answer 2

Decreases, Increases.

Question 3

In an Ohmic Conductor, Current & Resistance are ___ Proportional.

Answer 3

Inversely.

Question 4

For an Ohmic Metallic Conductor, an Increase in Temperature Causes an ___ in Resistance.

Answer 4

Increase.

Question 5

For an Ohmic Metallic Conductor, a Decrease in Temperature Causes a ___ in Resistance.

Answer 5

Decrease.

Question 6

In an Ohmic Metallic Conductor, Temperature & Resistance are ___ Proportional.

Answer 6

Directly.

Question 7

For a Thermistor, an Increase in Temperature Causes a ___ in Resistance.

Answer 7

Decrease.

Question 8

In a Thermistor, Temperature & Resistance are ___ Proportional.

Answer 8

Inversely.

Question 9

A Thermistor is a ___ ___ Conductor & Sensory Resistor whose Resistance Varies with…

Answer 9

Non-Ohmic, Temperature.

Question 10

Most Thermistors are ___ ___ ___ Components. What does this mean?

Answer 10

Negative Temperature Coefficient (NTC).
This means that the Resistance & Temperature are Inversely Proportional.

Question 11

Describe the Shape of the Resistance-Temperature Graph of a Thermistor. Explain why it is Shaped like this.

Answer 11

Curves Downwards. Asymptotes at y=0.
This is Because Low Temperature, High Resistance, & High Temperature, Low Resistance.

Question 12

The ___ Through a Thermistor is Dependent on its ___.

Answer 12

Resistance, Temperature.