Magnetic Fields Lab. 1/16/15 Magnet warm-up Notes – magnets NOVA video – magnetic storm.

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Presentation transcript:

Magnetic Fields Lab

1/16/15 Magnet warm-up Notes – magnets NOVA video – magnetic storm

What do these things have in common?

Magnets!

Magnetism Warm-Up

Magnets… North and south poles Like poles __________. Opposite poles _______. attract repel

Magnetic Fields Like electric fields Field lines –Iron filings line up in field –More lines = stronger field

What makes a magnet a magnet?

Magnetic Domains Group of neighboring electrons’ magnetic fields

Permanent Magnets Domains permanently aligned Ex. – some metal alloys

Temporary Magnets Domains align when near a permanent magnet

Not Magnetic Domains never align

1/21/15 Quick review Quick notes Electromagnet lab Finish NOVA video

What makes a magnet a magnet?

Magnetic Domains Group of neighboring electrons’ magnetic fields

Permanent Magnets Domains permanently aligned Ex. – some metal alloys

Temporary Magnets Domains align when near a permanent magnet

Not Magnetic Domains never align

Electromagnet Temporary magnet –Coil of wire (solenoid) –Iron core –Battery

Uses of Magnetism Motors Speakers Generators

A simple generator…

Hamster Power!

Electric Generator ME to EE Power plants Flashlights,radios,cars

Electromagnet Lab