Resistance & Current
Science Practicals: GCSE, topic 3.1.4
Resistance
Resistance is a measure of how difficult it is for current to flow through a component.
Charge flow
- When charge flows in an electric circuit, the size of the current is affected by two things:
- The resistance: If the resistance is increased, the current will decrease.
- The potential difference: If the potential difference is increased the current will increase.
Units - Ohms
- Resistance is measured in ohms, Ω.
Test yourself on Resistance & Current
Resistance is a measure of the...
What variables affect the size of a current?
How would Ohm's Law be rearranged to calculate potential difference?