4A.5 Conduction and Resistance Flashcards
1
Q
what is the drift velocity
A
the slow overall movement of charges (electrons in a metal) in a current
2
Q
what is the transport equation
A
it defines an electric current I=nAve
3
Q
what is the expected drift velocity
A
millimeter per second
4
Q
why do electrons move slower inside a metal lattice
A
because of all the atoms, they collide with
5
Q
why do the semiconductors have a lower resistivity in higher temperatures compared to metal
A
because semiconductors density(in the transport equation) increases as the temperature increase (also more charge carriers)
