magnetic substances a magnet is an object that can attract other objects containing iron, cobalt,...
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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 crossAlways flow from North to SouthThe 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 magneticRed (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)