Graphs
Here are the graphs of how electric field strength and electric potential vary with distance from the centre of a charged sphere. In both cases R is the radius of the sphere.
The gradient of the electric potential graph gives us the electric field strength at that point. To find the gradient at a point on a curve we must draw a tangent to the line then calculate the gradient of the tangent:
If we rearrange the equation we can see where we get the top equation for electric potential.
sub in the equation for E
| Section 7 | Fields Comparison | |
|---|---|---|
| Lesson 6 | ||
| Learning Outcomes | To be able to describe and explain the motion of a charged particle in an electric field | |
| To be able to state the similarities between gravitational and electric fields | ||
| To be able to state the differences between gravitational and electric fields | M.BENYOHAI |