Electromagnetism When charged particles move they make a

Electromagnetism • When charged particles move, they make a magnetic field nearby. • Charged particles moving in a magnetic field feel a force (get pushed). • By using these effects when can: An electric motor from inside a cell phone, this causes vibrations for the vibrate mode. – Use motion and magnets to push charge (generate a current). – Use moving charge to make magnetic fields. An electromagnet uses moving charge to make a magnet. A direct current electric motor, uses moving charge and magnets to do work. The battery supplies current (moving charge), as it goes through the magnetic field it gets pushed, moving the motor. A generator does the opposite, it uses motion (like the hand turning the crank) and magnets to push charge around. It generates a current to power electrical devices.

Generators • Almost all power plants today use moving magnets to generate power. • Turbines are like fans that move with a fluid (like air or water). • The turbines spin, and move magnetic parts, generating Hydroelectric Plants use water to move turbines Burning coal or gas makes electricity. hot air that moves turbines. Wind turbines near Aalborg, Denmark. These use air to move turbines. Nuclear Power uses fission to boil water, and the vapour to move turbines. This is a form of solar power using the sun to heat a liquid to power a turbine.