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Published byJuliet Cook Modified over 9 years ago
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Magnetic Substances A magnet is an object that can attract other objects containing iron, cobalt, or nickel. Magnetism describes all the phenomena caused by magnets Has two opposite poles - North and South Similar poles repel & opposite poles attract The magnetic field can be mapped
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Ferromagnetic Substances Not a magnet but something that can become magnetized by hitting, heating, or touching it with a magnet OR by adding an electrical charge (electromagnet) Is attracted by a magnet Must contain one of the following: iron, nickel or cobalt The magnetism can be turned on and off.
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Non-magnetic Substance Cannot be magnetized Glass, plastic, rubber or wood Work well as insulators for electrical wires
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Mapping Magnetic Fields Rules: The magnetic field lines can never cross Always flow from North to South The closer the lines, the stronger the attraction
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Magnets Shape – shown by lines of force which can be straight, curved, or circular Direction – shown by arrowheads. The direction is ALWAYS from North to South Strength – shown by how close the lines are to each other. Closer the lines, the stronger the magnetic field
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Compass The needle of the compass is magnetic Red (or any color) tip of the needle is considered North and will always be attracted towards its opposite the South
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Magnetism Magnetism describes all the phenemona caused by magnets Magnetic Field is the area of space in which the magnetic force of a magnet can act on another magnet Electromagnetism describes all the phenomena resulting from the interaction between electricity and magnetism
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Magnetic Live Wire Field Right hand rule can determine which direction the magnetic field lines are moving (fingers) What direction the conventional current is moving (thumb)
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