unit 5 electricity & magnetism
DESCRIPTION
Unit 5 Electricity & Magnetism. Standards - S8P5c - Magnetism, S8P5b - Electrical Circuits, S8P5c - Electromagnetism. Magnets. Any material that attracts iron and materials that contain iron. The attraction or repulsion of magnetic materials is called magnetism. - PowerPoint PPT PresentationTRANSCRIPT
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Unit 5Electricity & Magnetism
Standards - S8P5c - Magnetism, S8P5b - Electrical Circuits, S8P5c
- Electromagnetism
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Magnets• Any material that attracts iron and materials
that contain iron.• The attraction or repulsion of magnetic
materials is called magnetism.• One part of a magnet will always point north
when allowed to swing freely.
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Magnetic Poles• One of two ends of a magnet where the
magnetic effect is strongest.• North pole points north. Other pole is called
South pole.
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Magnetic Interactions• Magnetic poles that are unlike attract each
other, and magnetic poles that are alike repel each other.
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Magnetic Force• The attraction
or repulsion between magnetic poles; can cause an object to move.
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Magnetic Fields• The area of magnetic force around a magnet.• Magnetic field lines are invisible lines that
map out the magnetic field around a magnet, and spread out from one pole, curve around the magnet, and return to the other pole.
• Magnetic fields can be single or combined.
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Single Magnetic Field
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Combined Magnetic Field
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Magnetic Domains• A grouping of atoms that have their magnetic
fields aligned; acts like a bar magnet with a north pole and a south pole.
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Alignment of Domains• In a magnetized material, all or most of the
magnetic domains are arranged in the same direction.
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Magnetic Materials• A material that shows strong magnetic
properties is said to be a ferromagnetic material.
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Making Magnets• Magnets can be
made from ferromagnetic material.
• They can be temporary (easily loses its magnetism) or permanent (keeps its magnetism for a long time)
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• Magnets can be destroyed when they become un-magnetized by dropping, heating, or striking them.
• Magnets can be broken apart to have two smaller magnets with their own north and south poles
Changing Magnets