2.2 Resistance Flashcards
1
Q
Potential difference
A
The potential difference between two points is the amount of electrical energy transferred to other forms of energy when 1 coulomb of charge flows between the two points
2
Q
What is the unit for potential difference
A
V, Volt
3
Q
What is the equation for potential difference
A
Volts = W / Q
4
Q
The resistance of a conductor is …
A
The potential difference placed across it divided by the resulting current through it.
5
Q
What are the unit for resistance
A
ohms, Ω
6
Q
What causes electrical resistance
A
Collisions between the free electrons and the positive ions transferee energy into the ions, this increases the temperature of the metal
