4A.4 Resistivity Flashcards
1
Q
what is resistance a result of
A
collisions between charge carriers and the atoms in the current path
2
Q
what effects determine the resistance of a material
A
- the density of charge carries
- the density of the fixed atoms
- the strength of the forces between them
3
Q
resistivity for a material
A
it is the same value of resistance between opposite faces of a cubic meter of the material
4
Q
what is the SI unit for resistivity
A
OHMS m
5
Q
what is the formula for resistivity
A
p= RA/l
6
Q
the resistance of an object is dependent on
A
- the dimensions of a material
2. what the material is made from
