Essential Question- What is magnetism and how does it relate to electricity?. Magnetism Chapter 21. Vocabula ry. Magnetic Domain Magnetic Field Magnetosphere Alternating Current Aurora. Direct Current Electromagnet Generator Motor Transformer. How magnets work.
Essential Question-What is magnetism and how does it relate to electricity?
Magnetic field-a space around a magnet where the magnetic force is active.
Magnetic Domain-a group of atoms with their magnetic fields pointing in the same direction.
Aurora-the light given off from the sun’s charged particles crashing into atoms in the Earth’s atmosphere.
The Lodestone- the original natural magnet
Examples of Biomagnetism
How do they work?
Electric Motors- any machine that changes electric energy into kinetic energy. http://www.arthursclipart.org/engineer/engineer/electric%20motor.gif
What is a motor?
How does it keep running?
Direct Current (DC)-
A current in which electrons only flow in one direction. (used in battery powered electronics.
Alternating Current (AC)-
a current that changes direction. (used in plug in electronics)
- uses magnets to convert motion energy to electricity
Power Plants contain Electric Generators, machines that use a magnetic field to turn motion into electricity
Transformer- a machine that changes the voltage of an alternating current without losing much energy.
A magnet floats above a superconductor
Particle accelerators use superconductors to get particles up to nearly the speed of light,
Natural magnet (lodestone)