magnets -...
TRANSCRIPT
7 Magnetism.notebook
1
December 03, 2018
May 179:24 AM
Magnets
May 179:26 AM
The magnetism of an item has to do with its Domains
Tiny atom sized poles inside an object (actually its electron spin)
7 Magnetism.notebook
2
December 03, 2018
Magnetic polarity
Magnetic fields
7 Magnetism.notebook
3
December 03, 2018
Jan 139:40 AM
Field Strength at a distance
N S
g≈ 1d2 ε≈ 1
d2B≈ 1
d3
Magnetic poles
7 Magnetism.notebook
4
December 03, 2018
May 179:25 AM
Current and magnetismthe movement of charged particles will cause the formation of a magnetic field
Dec 38:46 AM
Conventional Current assumes that current flows out of the positive terminal (positive particles). It is wrong!Electron Flow is what actually happens and electrons flow out of the negative terminal.
To avoid confusion pay attention to what is moving; electrons or positive particles (conventional current)
7 Magnetism.notebook
5
December 03, 2018
May 179:30 AM
Left hand rule for conductors
Reach out to grab wire with Left HandPoint thumb in direction of the negative particle's motionFingers wrap with the magnetics field
Jan 139:21 AM
p+
7 Magnetism.notebook
6
December 03, 2018
May 179:34 AM
CoilsThe magnetic field of a wire can be increased by upping the current or placing many wires side by side
May 179:30 AM
7 Magnetism.notebook
7
December 03, 2018
May 179:35 AM
May 179:36 AM
Left hand rule for CoilsFingers follow the negative particles inFingers wrap with the coilThumb points in direction of the field
7 Magnetism.notebook
8
December 03, 2018
Jan 139:33 AM
Dec 1312:45 PM
Page 647 #1,2&4Page 650 #5 8page 665 #58 62