Resistance Flashcards
1
Q
What is Resistance?
A
The opposition to the flow of electric current.
2
Q
Where does resistance occur?
A
In all conductors and components of electric circuit
3
Q
How does length of a conductor affect resistance?
A
The longer the conductor -> the higher the R, as electrons need to travel more
4
Q
How does temperature affect resistance?
A
The higher the temp, the higher the resistance
Because atoms vibrate more, harder to flow through
5
Q
How does the cross sectional area of the conductor affect resistance?
A
The smaller the area, the more resistance
Because less space to travel through
6
Q
Ohm’s Law
A
V=IR
V: voltage
I: current
R: resistance
UNITS Ω
7
Q
What do resistors do?
A
Slows flow of electrons, creating resistance
8
Q
Non-Ohmic Resistors
A
Don’t follow Ohm’s Law [on the graph it curves]
