Electricity is made of atoms Protons ElectronsPositive Charge Negative Charge
Neutral or charged ?- When there is an equal number of protons and electrons we say that the object is ELECTRICALLY NEUTRAL .- When there are more protons that electrons we say that the object is POSITIVELY CHARGED.- When there are more electrons that protons we say that the object is NEGATIVELY CHARGED.Electrons can moveElectrons can move from one object to another .
Electric Current• Electric Current is the movement of negatively charged electrons through materials .Conductors : These materials allow electricity to floweasily . We use these materials in electrical circuits.Insulators : Insulators dont allow electricity to flow easily andwe use these materials to protect ourselves.
Magnetism• Magnetism is a property of some materials .They can attract or repel .If we put their identical poles togheter , the magnets repel each otrherIf we put their opposite poles together , the magnets attract each other
Electromagnets• An electromagnet is a device that acts like a magnet when an electric current passes through it .