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

The earth's magnetic field is

The strength of the earth's magnetic field is

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

The horizontal component of the earth's magnetic field at any place is 0.36 xx 10^(-4) Wb m^(-2) If the angle of dip at that place is 60 ^@ then the value of the vertical component of earth's magnetic field will be ( in Wb m^(-2))

The angle of dip at a place is 40.6^(@) and the intensity of the vertical component of the earth's magnetic field V=6xx10^(-5) Tesla. The total intensity of the earth's magnetic field (I) at this place is

A magnetic needle free to rotate in a vertical plane parallel to the magnetic meridian has its north tip pointing down at 22^@ with the horizontal. The horizontal component of the earth's magnetic field at the place is known to be 0*35G . Determine the strength of the earth's magnetic field at the place.

At a place, the horizontal component of earth's magnetic field is V and angle of dip is 60^(@) . What is te value of horizontal component of earth's magnetic field at equator ?

A magnetic needle free to rotate in a vertical plane parallel to the magnetic meridian has its north tip down at 60^(@) with the horizontal.The horizontal component of the earth's magnetic field at the place is known to be 0.4G .Determine the magnitude of the earth's magnetic field at the place.

A magnetic needle free to rotate in a vertical plane parallel to magnetic meridian has its north tip down at 60^@ with the horizontal. The horizontal component of earth's magnetic field at that place is 0*4G . Determine the magnitude of earth's magnetic field at the place.

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).