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.

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

The earth magnetic field at the equator is approximately 04.G. Estimate the earth's dipole moment.

A short bar magnet placed with its axis at 30^(@) with a uniform external magnetic field of 0.25T. T experiences a torque of magnitude equal to 4.5 xx 10^(-2)J . What is the magnitude of magntic moment of the magnet?

Magnetic field on t:quatur of Earth is 4 xx 10^(-5) T. Radius of Earth is 6400 km, then magnetic dipole moment of Earth is about ...... Am^(-2) .

A short bar magnet of magnetic moment 5.25 xx 10^(-2) JT^(-1) is placed with its axis perpendicular to the earth's field direction. At what distance from the centre of the magnet, the resultant field is inclined at 45^@ with earth's field on (a) its normal bisector and (b) its axis. Magnitude of the earth's fleld at the place is given to be 0.42 G. Ignore the length of the magnet in comparison to the distances involved.