magnets

• Electromagnets are created by passing an electric current through a coil of wire and are only magnetic when the current is flowing.
• Magnets are used in many different ways such as holding things together (e.g. fridge magnets), moving things along tracks (e.g. trains) and making electricity flow through wires (electric motors).
• The north pole of one magnet will always be attracted to the south pole of another magnet.
• A magnet is an object that attracts other objects made from iron, steel or nickel.
• Electromagnets use an electric current to produce a magnetic field and lose magnetism when the electric current is removed.
• Permanent magnets produce their own magnetic field and retain magnetism permanently.
• When two like poles are brought close together they repel each other.
• Magnetic fields can pass through some materials but not others.
• Unlike poles have opposite properties so they pull towards each other.
• Like poles have similar properties so they push away from each other.
• Like poles have similar properties and opposite poles have opposing properties.
• Magnetic fields can be produced using permanent magnets or electromagnets.
• Like poles repel each other while unlike poles attract each other.
• When two poles of opposite types are brought close together they repel each other.
• Magnetic fields can be produced using electromagnetism.
• If two like poles face each other, then they repel each other.
• When two magnets are brought close together, their poles repel each other unless they have opposite poles facing each other.
• Iron filings show where there is a magnetic field by clumping around the magnet.
• A magnetic field is the area around a magnet where it has an effect on another object with its own magnetic field.
• The strength of the force between two magnets depends on how strong the magnets are, how far apart they are, and whether or not there is an object blocking the path of the magnetic field.