question_answer 13)

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 14 cm from the centre of the magnet. The earth’s magnetic field at the place is 0.36 G and the angle of is zero. What is the total magnetic field 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 opposite the horizontal component of earth's magnetic, field.) 

Answer:

Magnetic field at the equatorial line of magnet is given by                                               Total magnetic field                 in the direction of magnetic field of the earth.