1
Q
resistance depends on
A
density of charge carriers
density of fixed atoms
dimensions of conductor
2
Q
what is resistance caused by
A
collisions of charge carriers and atoms in the currents path
3
Q
resistivity
A
property of a material tp resist flow of current
4
Q
iv graph gradient
A
1/resistance
so steep line = low resistance
shallow line = high resistance
5
Q
resistance =
A
pl/a
6
Q
resistivity units
A
ohms metres
