Resistance (5.4) Flashcards
1
Q
What is Resistivity
A
Refers to how much a material opposes the flow of electrical charge
2
Q
Resistance affects current and voltage (NA)
A
3
Q
What is resistance defined as
A
Opposition of flow of current through a conductor such as wire
4
Q
The resistance of an ohmic device is constant for (look on pp for thing)
A
5
Q
Define ohmic and non ohmic materials
A
Ohmic -> Conductors that obey ohms law are ohmic conductors, they are called resistors
Non Ohmic Conductors -> conductors that don’t obey ohm’s law
6
Q
Variables affecting resistance
A
Cross sectional area of material
Length of material
Temperature -> higher temperatures increase the resistance of a wire
