Magnetism

Magnets -opposites attract -like repels -most metals attract -make compasses from Earth’s magnetic field -Earth - a big magnet with N and S poles. -permanent or temporary magnets

Electricity and Magnetism Electricity & Magnetism are Related Electricity flowing through a wire creates a magnetic field around the wire This creates an Electromagnet = A temporary magnet made of iron wire carrying an electric current.

Strength of Electromagnet You can increase the strength of an electromagnet by… increasing the number of coils. (a straight wire has a weak magnetic field) increasing the amps of current.

Electromagnetic Induction Electric current produces a magnetic field and a magnetic field can produce an electric current *Running electric current through a wire or solenoid wrapped around iron creates a magnetic field or a magnet. EX: electromagnet

Electric Charge *Moving a loop of wire through a magnetic field creates an electric charge. EX: Generators or simple motors

Generators Produce electric current by rotating a loop of wire through a magnetic field. Rotating magnets are connected to turbine. Turbines are large wheels that rotate due to steam. Steam is created by the burning of fossil fuels or nuclear power