Answer the following questions regarding earth’s magnetism: (a) A vector needs three quantities for its specification. Name the three independent quantities conventionally used to specify theearth’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 Melbourne in Australia, would the lines seem to go into the ground or come outof the ground? (d) In which direction would a compass free to move in the verticalplane point to, if located right on the geomagnetic north or southpole? (e) The earth’s field, it is claimed, roughly approximates the fielddue to a dipole of magnetic moment 8 × 1022 J T–1 located at itscentre. Check the order of magnitude of this number in someway. (f ) Geologists claim that besides the main magnetic N-S poles, thereare several local poles on the earth’s surface oriented in differentdirections. How is such a thing possible at all?

Answer the following questions regarding earth’s magnetism: (a) A ve

1.	Answer the following questions regarding earth’s magnetism: (a) A vector needs three quantities for its specification. Name the three independent quantities conventionally used to specify theearth’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 Melbourne in Australia, would the lines seem to go into the ground or come outof the ground? (d) In which direction would a compass free to move in the verticalplane point to, if located right on the geomagnetic north or southpole? (e) The earth’s field, it is claimed, roughly approximates the fielddue to a dipole of magnetic moment 8 × 1022 J T–1 located at itscentre. Check the order of magnitude of this number in someway. (f ) Geologists claim that besides the main magnetic N-S poles, thereare several local poles on the earth’s surface oriented in differentdirections. How is such a thing possible at all?
Answer» Answer the following questions regarding earth’s magnetism: (a) A vector needs three quantities for its specification. Name the three independent quantities conventionally used to specify theearth’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 Melbourne in Australia, would the lines seem to go into the ground or come outof the ground? (d) In which direction would a compass free to move in the verticalplane point to, if located right on the geomagnetic north or southpole? (e) The earth’s field, it is claimed, roughly approximates the fielddue to a dipole of magnetic moment 8 × 1022 J T–1 located at itscentre. Check the order of magnitude of this number in someway. (f ) Geologists claim that besides the main magnetic N-S poles, thereare several local poles on the earth’s surface oriented in differentdirections. How is such a thing possible at all?

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