Difference between revisions of "Electrical Resistance"
| Line 9: | Line 9: | ||
===Equation=== | ===Equation=== | ||
| − | :<math> | + | :<math>Resistance = \tfrac{Potential Difference}{Current}</math> |
| − | : <math> | + | :<math>R = \tfrac{V}{I}</math> |
| + | Where: | ||
| + | : R = Resistance | ||
| + | : V = Potential Difference | ||
| + | : I = Current | ||
Revision as of 17:44, 25 October 2018
Key Stage 3
Meaning
Resistance is a description of how difficult it is to increase the current through a conductor when increasing the potential difference.
About Resistance
- The unit of resistance is the Ohm (Ω).
- Resistance cannot be directly measured. Resistance must be calculated by dividing the Potential Difference by the Current.
- Conductors have a low resistance and insulators have a high resistance.
Equation
\[Resistance = \tfrac{Potential Difference}{Current}\] \[R = \tfrac{V}{I}\] Where:
- R = Resistance
- V = Potential Difference
- I = Current