PHYS1220 Lecture Notes - Lecture 7: South Magnetic Pole, Geographical Pole, Antarctica
10 Oct 2018
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Document Summary
A magnetic field surrounds any material with permanent magnetism. Every magnet has two magnetic poles: north and south poles. Like poles repel each other: n-n or s-s. The magnetic field is a vector quantity. North magnetic pole near antartica, south magnetic pole near canada. About 1300 km from the north geographic pole. The position of geomagnetic poles varies over time and has even reversed. The magnetic field of the sun reverses every 11 years. The magnetic field created by the spin of the earth and convection created by the core. The magnetic field strength of various areas of the earth. Declination: deviation of the compass needle from true north, the degree of declination varies depending on where on earth the compass is, some areas true north = magnetic north. Inclination: the angle of the field to the vertical. Declination angles at various parts of the earth.
