PhysicsMrs. Coyle

Lorentz Force- Magnetic Force on a Current Carrying Wire (Fendt Applet)

F=BILsin I: current (conventional) angle between I and B

When =90o, then F=BIL

F

A wire 86cm long is carrying a current of 0.25A at right angles to a uniform magnetic field of 15T.

Find the magnitude of the magnetic force.

Answer: 3.3N

What is the direction of the magnetic force acting on this wire?

I

Answer: Upwards

+ -

Electric DC Motor (Fendt Applet)

Basic DC Motor