Why is resistivity inversely proportional to resistance for NTC semiconductors?

In summary, resistivity and resistance are both important parameters in NTC semiconductors that are affected by changes in temperature. The resistivity of NTC semiconductors is inversely proportional to their resistance, meaning that as temperature increases, both values decrease. Other factors such as impurities and material composition can also affect the resistance of NTC semiconductors. However, this relationship between resistivity and resistance is specific to NTC semiconductors and does not apply to PTC semiconductors, which have a positive relationship between resistivity and resistance.
  • #1
homeworkhelpls
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TL;DR Summary
for NTC semiconductors?
Why is resistivity inversely proportional to resistance for NTC semiconductors?
 
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  • #2
homeworkhelpls said:
TL;DR Summary: for NTC semiconductors?

Why is resistivity inversely proportional to resistance for NTC semiconductors?
Can you link to a reference?
 
  • #3
homeworkhelpls said:
Why is resistivity inversely proportional to resistance for NTC semiconductors?
Why is resistivity inversely proportional to temperature for NTC semiconductors?
https://en.wikipedia.org/wiki/Thermistor#Conduction_model
 
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  • #4
Baluncore said:
Why is resistivity inversely proportional to temperature for NTC semiconductors?
That makes much more sense!
 

1. Why is resistivity inversely proportional to resistance for NTC semiconductors?

The resistivity of a material is a measure of how easily it conducts electricity. In NTC (Negative Temperature Coefficient) semiconductors, the resistivity decreases as the temperature increases. This means that the resistance of the material decreases as the temperature increases, making them inversely proportional.

2. What causes the decrease in resistivity for NTC semiconductors?

The decrease in resistivity for NTC semiconductors is due to the increase in the number of free electrons at higher temperatures. As the temperature increases, more electrons are able to break free from their bonds and move freely through the material, resulting in a decrease in resistance.

3. How does the temperature affect the resistivity of NTC semiconductors?

The resistivity of NTC semiconductors decreases as the temperature increases. This is because the increase in temperature causes the atoms in the material to vibrate more, which in turn allows more free electrons to move through the material, decreasing its resistance.

4. Why are NTC semiconductors used in temperature sensors?

NTC semiconductors are commonly used in temperature sensors because of their negative temperature coefficient. This means that as the temperature increases, the resistance of the material decreases, making it a reliable and accurate way to measure temperature changes.

5. Are there any other factors that can affect the resistivity of NTC semiconductors?

Apart from temperature, the resistivity of NTC semiconductors can also be affected by impurities in the material, the composition of the material, and the physical structure of the material. These factors can all play a role in the number of free electrons and how easily they can move through the material, ultimately affecting its resistivity.

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