10.5 - Effect of temperature on the resistivity of a semiconductor Flashcards
1
Q
What is an example of a semiconductor?
A
A thermistor, otherwise known as a thermal resistor
2
Q
What type of temperature coefficient does a thermistor have?
A
A negative temperature coefficient
3
Q
What does this mean?
A
That as temperature increases, the resistance decreases
4
Q
How can this be explored in the lab?
A
By measuring the resistance, using an ohmmeter, of the thermistor at different temperatures
5
Q
How can an NTC thermistor be explained using the equation, I = nAvq?
A
As the temperature increases, more charge carriers can be released, with A and q remaining constant, thus increasing the value of I
6
Q
As the temperature of an NTC thermistor increases, what happens to its resistivity?
A
It decreases
