Size of the Force
The size of the force on a wire of length l, carrying a current I placed in a magnetic field of magnetic flux density B is given by the equation:
Here the wire is at 90° to the magnetic field lines.
When the wire is at an angle of θ with the magnetic field the force is given by:
If we rearrange the equation towe see that 1 Tesla is the magnetic flux density (field strength) that causes a 1 Newton force to act on 1 metre of wire carrying 1 Amp of current.
Magnetic Flux Density is measured in Tesla, T
This equation looks very familiar if we compare it to the force in a gravitational and electric field.
| Section 7 | Force on a Charged Particle | |
|---|---|---|
| Lesson 12 | ||
| Learning Outcomes | To be able to calculate the size and direction of the force on a charged particle in a magnetic field | |
| To be able to describe the motion of a charged particle in a magnetic field | ||
| To be able to describe the main features of a cyclotron and explain how it works | M.BENYOHAI |