4.3 Resistance Flashcards
0
Q
What is Ohms law?
A
The current through a resistor at constant temperature is directly proportional to the potential difference accross the resistor
1
Q
What is the unit of resistance?
A
Ohm Ω
2
Q
What device is used to measure current?
A
An ammetre
3
Q
What are current potential difference graphs used for?
A
to show how the current through a component varries with the potential differnce accross it
