1. Basics of Magnetism
North pole, South pole, and magnetic field
Magnets and domains
How magnets pick things up
Wires with current
Whiteboard – direction of B field around wire
Loops
Whiteboard – direction of North pole

2. THE EARTH’S NORTH POLE IS A MAGNETIC SOUTH POLE!
Demo -
Magnet in dish on overhead
Definition of N and S poles
Compass on overhead
Finding polarity of a magnet
Shocking revelation

4. Demo Magnet on pivot There is no magnetic monopole Demo - iron filings
B field is N to S

5. How do magnets pick things up?
Induced magnetism
Distance/Force
Demo with compass
Magnet S N S
Induced
Magnet
Ferrous material
(No induced)

6. + to - Remember electric field Direction of B is from N to S Demo:
Magnaprobe and fixed magnet
Remember – B Field Lines:
Leave the N pole
Enter the S pole
Remember electric field + -
+ to -

7. Magnetic fields encircle wires
Thumb in direction of I, fingers wrap as B (Magnetic field)
Demo with Magnaprobe/Giant Solenoid

8. Direction field around wire
Whiteboards
Direction field around wire
1 | 2 | 3 | 4

9. Which direction is the magnetic field in front of this wire?
right

10. Which direction is the magnetic field behind this wire?
left

11. Which direction is the magnetic field behind this wire?up

12. Which direction is the magnetic field around this wire?

13. Loops of wire act as magnets with a N and S pole:
Show with giant solenoid

14. N I
Wrap your Rt. fingers with the current, and your thumb is the N pole

15. Whiteboards
Direction North Pole
1 | 2 | 3 | 4

16. Where da North Pole?
outa da page

17. Where da North Pole?
into da page

18. Current goes up in the front of the coil
Where da North Pole?
Current goes up in the front of the coil
left side

19. Current goes right in the front of the coil
Where da North Pole?
Current goes right in the front of the coil
Top

20. Current goes down in the front of the coil
Where da North Pole?
Current goes down in the front of the coil
right side

21. Current goes left in the front of the coil
Where da North Pole?
Current goes left in the front of the coil
bottom