Survey

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Document related concepts

Edward Sabine wikipedia, lookup

Neutron magnetic moment wikipedia, lookup

Geomagnetic storm wikipedia, lookup

Friction-plate electromagnetic couplings wikipedia, lookup

Electromotive force wikipedia, lookup

Maxwell's equations wikipedia, lookup

Compass wikipedia, lookup

Magnetic monopole wikipedia, lookup

Magnetometer wikipedia, lookup

Mathematical descriptions of the electromagnetic field wikipedia, lookup

Magnetic field wikipedia, lookup

Giant magnetoresistance wikipedia, lookup

Magnetotactic bacteria wikipedia, lookup

Aurora wikipedia, lookup

Lorentz force wikipedia, lookup

Earth's magnetic field wikipedia, lookup

Multiferroics wikipedia, lookup

Electromagnetism wikipedia, lookup

Magnetochemistry wikipedia, lookup

Ferrofluid wikipedia, lookup

Magnetohydrodynamics wikipedia, lookup

Magnetoreception wikipedia, lookup

Magnetotellurics wikipedia, lookup

Electromagnetic field wikipedia, lookup

Eddy current wikipedia, lookup

Magnetism wikipedia, lookup

Electromagnet wikipedia, lookup

Magnet wikipedia, lookup

Force between magnets wikipedia, lookup

Ferromagnetism wikipedia, lookup

Superconducting magnet wikipedia, lookup

History of geomagnetism wikipedia, lookup

Transcript
```Week 5: Magnetism
October 16th, 2015
Katie Hellier
Last Week
• Electric Fields
• Where do they come from?
• How do they work?
• What effects do they have on us?
Magnetism
• Moving charges interacting with moving
charges
• Ex: two wires
• Magnetic forces are electrical forces in a
different frame of reference (relativity)
• Comes from what the material is made
of (atoms, structure)
How does it work?
Think about electricity – attraction vs
repulsion
Video
• Bill Nye the Science Guy
Magnetic Fields
B~I
Units: T (Tesla)
• Create the force exerted on a charge due to
magnetism
• Field lines move from North to South
• Objects align along field (ie compass)
• Magnetic poles are where field lines start and end
• Direction – Force is perpendicular to both the
magnetic field and direction of motion
Earth’s Field
• Molten Iron core
• Field keeps radiation and solar winds
out
• Creates Aurora Borealis
• Like to bar magnet
• Why is North actually
South?
Video
• The Science Behind Magnets
Different Types of Magnets
• Ferromagnetic:
• Permanent magnet – creates own field, is
attracted to other magnets
• Paramagnetic:
• Temporary magnet – attracted by an
external field, goes away
• Electromagnets:
• Adjustable magnets created by running
current through a coil of wire
Phets
• Magnet and Compass
• Magents and Electromagnets
Magnetism Lab
• Mapping the magnetic field
• Pick a partner
• Select a magnet
• Work with the table to graph the
magnetic field
```
Related documents