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

Name the three fundamental quantities.

Which of the following is independent quantities is no used to specify the earth's magnetic field?

Which of the following is independent quantities is not used to specify the earth's magnetic field?

Name the elements of the earth's magnetic field.

Answer the following questions regarding earth's magnetism. a. A vector needs three quantities conventionally used to specify the earth's magnetic field. b. The angle of dip at a location in southern India is about 18^@ . Would you expect a greater or smaller dip angle in Britain ? c. If you made a map of magnetic field lines at Melboune in Australia, would the lines seem to go into the groung or come out of the ground ? d. 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 ? e. the earth' s field, it is claimed roughly approximates the field due to a dipole of magnetic moment 8 xx10^(22)JT^(-1) located at its centre. Check the order of magnitude of this number in some way. f. 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 ?

Name three elements required to specify the earth’s magnetic field at a given place.

Write three dimensional quantity.