Resistivity Flashcards
1
Q
What is resistivity opposite to?
A
Conductivity
2
Q
What is resistivity?
A
a property in which materials will inhibit different currents due to structure differences (defines resistance based on dimensions)
3
Q
Can resistivity change?
A
yes, as it is related to the amount of charge carriers and hence changes with temperature
4
Q
What is the equation for resistivity?
A
R = pl/a where r = resistance p = resistivity l = length a = area
5
Q
What is ohm’s law?
A
states that current is directly proportional to pd as long as temperature is constant
6
Q
Object obeying ohm’s law is called?
A
ohmic conductor
7
Q
What does this law mean for the resistance?
A
It stays constant
