magnetic substances a magnet is an object that can attract other objects containing iron, cobalt,...
TRANSCRIPT
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
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.
Non-magnetic Substance Cannot be magnetized
Glass, plastic, rubber or wood
Work well as insulators for electrical wires
Mapping Magnetic Fields Rules:
The magnetic field lines can never crossAlways flow from North to SouthThe closer the lines, the stronger the
attraction
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
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
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
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)