Answer the question regarding earth's magnetism:
A vector needs three quantities for its specification. Name the three independent quantities conventionally used to specify the earth's magnetic field.

Name the elements of the earth's magnetic field.

Answer the question regarding earth's magnetism: If you made a map of magnetic field lines at Melbourne in Australia, would the lines seem to go into the ground or come out of the ground?

Answer the question regarding earth's magnetism: In which direction would a compass free to move in the vertical plane point to, if located right on the geomagnetic north or south pole?

Answer the question regarding earth's magnetism: Geologists claim that besides the main magnetic N-S poles, there are several local poles on the earth's surface oriented in different directions. How is such a thing possible at all?

Answer the question regarding earth's magnetism: The angle of dip at a location in southern India is about 18^@. Would you expect a greater or smaller dip angle in Britain?

Answer the question regarding earth's magnetism: The earth's field, it is claimed, roughly approximates the field due to a dipole of magnetic moment 8 xx 10^(22) JT^(-1) located at its centre. Check the order of magnitude of this number in some way.