10.4 - Effect of temperature on the resistivity of a metal Flashcards
1
Q
At higher temperatures, what happens to the resistance of a metal wire?
A
It increases
2
Q
What does the increased temperature cause to happen?
A
It causes the metal ions in the wire to have more kinetic energy
3
Q
What does this mean?
A
That the metal ions begin to vibrate
4
Q
What do these vibrations mean?
A
That the frequency of collisions between electrons and metal ions increases
5
Q
What does this mean for resistivity?
A
It increases
6
Q
What happens to drift velocity at high temperatures?
A
It is reduced due to the increased frequency of collisions between electrons and metal ions
7
Q
What will happen to the current?
A
It will also decrease, as it is the flow of electrons, which are moving slower
