Answer thefollowing questions regarding earth’s magnetism:(a) A vectorneeds three quantities for its specification. Name the threeindependent quantities conventionally used to specify the earth’smagnetic field.(b) The angle ofdip at a location in southern India is about 18º.Would you expect a greater or smaller dip angle in Britain?(c) If you madea map of magnetic field lines at Melbourne in Australia, would thelines seem to go into the ground or come out of the ground?(d) In whichdirection would a compass free to move in the vertical plane pointto, if located right on the geomagnetic north or south pole?(e) The earth’sfield, it is claimed, roughly approximates the field due to a dipoleof magnetic moment 8 × 1022 J T−1located at its centre. Check the order of magnitude of this number insome way.(f ) Geologistsclaim that besides the main magnetic N-S poles, there are severallocal poles on the earth’s surface oriented in differentdirections. How is such a thing possible at all?