Notes - Magnetism p.582~589

● Magnetic Field is the repartion of a magnetic force in a region of a magnet.

●We use test compass to measure the magnetic forces within an area or object, instead of the test charge we used in electrostatics.

●Magnet attracts ferrous objects such as, pieces of iron, steel, nickel and cobalt.

●The magnet repel one another if both magnetic poles are north and north, or south and south ; The magnet attract one another if magnectic poles are difference(dissimilar). <North and South>

●The Domin Theory tells us that all large magnet are constitute by many smaller and rotatable magnet. Those small and rotatable magents are called dipoles. Dipoles can interact with other dipoles to close by.

● Magnetic Domin is created if dipoles are lined up.

●Oersted’s Principle is an important discovery made by Hans Christian Oersted. Oersted’s Principle tells that a circular magnetic field around the conductor is produced when charge moving through a conductor.

●There are two right- hand rules that help us to predict how magnetic force act. Right- hand rules are like physical formula because they allow us to take certain known factors and predict one unknown factor.

●The first right hand rule for convertional current flow is used to determine the direction of current flow in a conductor. The conductor where you right hand's thumb is pointing at, is the direction of convertional. (positive current flow).


●The second Right hand rule is to determine the direction of current flow within a coiled. The thumb point at the direction of the magnetic field within thr coil.