Answer the following questions: The earth’s magnetic field varies from point to point in space. Does it also change with time? If so, on what time scale does it change appreciably?

Does earth's magnetic field also change from time to time? If yes on what times scale does it change appreciably?

Answer the following questions: A magnetic field that varies in magnitude from point to point but has a constant direction (east to west) is set up in a chamber. A charged particle enters the chamber and travels undeflected along a straight path with constant speed. What can you say about the initial velocity of the particle?

Answer the following questions:The earth’s core Is known to contain Iron. Yet geologists do not regard this as a source of the earth’s magnetism. Why?

Answer the following questions: A certain region of space is to be shielded from magnetic fields. Suggest a method.

Answer the following questions : A man with a wristwatch on his hand falls from the top of a tower. Does the watch give correct time during the free fall ?

Answer the following questions:The earth’s field departs from its dipole shape substantially at large distances (greater than about 30,000 km). What agencies may be responsible for this distortion?

Answer the following questions: Does the apparent depth of a tank of water change if viewed obliquely? If so, does the apparent depth increase or decrease?

Answer the following questions regarding earth’s magnetism: In which direction would a compass free point to, If located right on the geographic north or south pole?

Answer the following questions: Why does a paramagnetic sample display greater magnetisation (for the same magnetising field) when cooled?

Answer the following questions 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?