Give any one evidence which points towards the existance of the Earth.s magnetic field .

The earth's magnetic field is

The strength of the earth's magnetic field is

State two evidences of the existence of earth's magnetic field.

A magnetic dipole of magnetic moment 0.72(sqrt(2) Am^2) is placed horizontally with the north pole pointing towards east. Find the position of the neutral point if the horizontal component of the earth's magnetic field is 18 muT .

A magnetic dipole of magnetic moment 1.44 A m^2 is placed horizontally with the north pole pointing towards north. Find the positon of the neutral point if the horizontal component of the earth's magnetic field is 18 muT .

A magnetic dipole of magnetic moment 0.72 Am^2 is planced horizontally with the north pole pointing towards south. Find the position of the neutral point if the horizontal component of the earth's magnetic field 18 muT .

Which of the following is responsible for the earth's magnetic field?

A charged particle q is moving in the presence of a magnetic field B which is inclined at an angle 30^@ with the direction of motion of the particle. Draw the trajectory followed by the particle in the presence of the field and explain how the particle describes this path. (ii) Name three elements of the earth.s magnetic field which help in defining earth.s magnetic field completely.

A short bar magnet placed in a horizontal plane has its axis aligned along the magnetic north south direction. Null points are found on the axis of the magnet at 14cm from the centre of the magnet. The earth's magnetic field at the plane is 0*36G and the angle of dip is zero. What is the total magnetic field on the normal bisector of the magnet at the same distance as the null points (i.e. 14 cm) from the centre of the magnet? (At null points, field due to a magnet is equal and apposite to the horizontal component of earth's magnetic field).

In the magnetic meridian of a certain place, the horizontal component of the earth's magnetic field is 0*26G and dip angle is 60^@ . What is the magnetic field of earth at this location?