▶Lesson video
Electrical resistance
0:00 / 0:00
Download:
Show transcript
An ammeter measures current in amps (A).
Resistance is a measure of how difficult it is for a current to flow.
Resistance is measured in ohms (Ω).
In a fair test, only the independent variable is changed so that no other variables affect the results.
The variables that are deliberately kept the same are called control variables.