1. Magnetic Force on a Current Carrying Wire
Physics
Mrs. Coyle

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

3. Magnetic Force on a Current Carrying Wire
F=BILsinq
I: current (conventional)
q: angle between I and B
When q=90o,
then F=BIL F

4. Problem
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

5. Example
What is the direction of the magnetic force acting on this wire? I
Answer: Upwards

6. DC Motor

7. Which way will the loop turn?

8. Torque on a Current Carrying Loop
Electric DC Motor (Fendt Applet)

9. Basic DC Motor