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. Magnetic north pole positions of the Earth
Magnetic north pole positions of the Earth. Poles shown are dip poles, defined as positions where the direction of the magnetic field is vertical. Red circles mark magnetic north pole positions as determined by direct observation, blue circles mark positions that have been modelled mathematically.

6. True north (The star symbol in the diagram indicates true north).
For Salt Lake City, declination is currently decreasing at a rate of about 7 minutes of a degree per year.
At the bottom of most USGS topographic quadrangle maps is a diagram that shows three north arrows -- true north, grid north, and magnetic north -- and the angles between them.
True north (The star symbol in the diagram indicates true north).
Magnetic north (MN) shows the direction a magnetic compass would point at the time the map was published.  
Grid north (GN) The difference between true north and grid north is an inherent effect of transforming the earth's spherical surface to a plane surface.

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

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

9. + 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 -

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

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

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

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

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

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

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

17. N I S
Wrap your Rt. fingers with the current, and your thumb is the N pole, the butt of your hand is the S Pole

18. why an iron core?
Demo

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

20. Where da North Pole?
outa da page

21. Where da North Pole?
into da page

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

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

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

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