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Electricity & Magnetism

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by

Sarah Blair

on 23 April 2014

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Transcript of Electricity & Magnetism

Electricity & Magnetism
Circuits
Series Circuits
Only one path for electrons to flow
If one light bulb breaks, they all stop working
Electricity
Electricity powers all circuits, lightbulbs, computers, TVs, and more!

Attract / Repel
Attract
Opposite charges attract
Positive (+) & Negative (-)
Compass
The needle in a compass is a magnet.
The needle always points North.
The compass is attracted to Earth's magnetic field

Electromagnets
Parallel Circuits
More than one path for electrons to flow
If one light bulb breaks, the rest still work
http://oviattfamily.net/electricity/flash/seriesCircuit.swf

http://oviattfamily.net/electricity/flash/paraCircuit.swf

Electric Current
Electric current is the movement of electrons through a wire.
ELECTRIC CURRENT IS WHEN THE ELECTRONS FLOW!
Repel
Same charges repel
Positive (+) & Postive (+)
Negative (-) & Negative (-)
http://phet.colorado.edu/sims/html/balloons-and-static-electricity/latest/balloons-and-static-electricity_en.html
Electromagnet Notes
Electromagnets are made of magnet, wire, & battery
Electromagnets can turn on & off
Electromagnets gets stronger when you wrap MORE wires around the iron object
Electromagnets are found in objects that create ... SOUND & MOTION
http://www.windows2universe.org/physical_science/magnetism/earth_magnet_dipole_interactive.html
http://www.ehow.co.uk/list_5908429_10-uses-electromagnet.html
Ready to learn more??
http://www.bbc.co.uk/bitesize/ks3/science/energy_electricity_forces/magnets_electric_effects/activity/
Magnets also Attract & Repel
North / South = attract
North / north = repel
South / south = repel
Where is the magnet the strongest?
http://www.physics-chemistry-interactive-flash-animation.com/electricity_electromagnetism_interactive/bar_magnet_magnetic_field_lines.htm
Full transcript