A short bar magnet placed in a horizontal plane has its axis alignedalong the magnetic north-south direction. Null points are found onthe 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 dip iszero. What is the total magnetic field on the normal bisector of themagnet at the same distance as the null–point (i.e., 14 cm) from the centre of the magnet? (At null points, field due to a magnet is equal and opposite to the horizontal component of earth’s magnetic field.)

A short bar magnet placed in a horizontal plane has its axis alignedal

1.	A short bar magnet placed in a horizontal plane has its axis alignedalong the magnetic north-south direction. Null points are found onthe 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 dip iszero. What is the total magnetic field on the normal bisector of themagnet at the same distance as the null–point (i.e., 14 cm) from the centre of the magnet? (At null points, field due to a magnet is equal and opposite to the horizontal component of earth’s magnetic field.)
Answer» A short bar magnet placed in a horizontal plane has its axis alignedalong the magnetic north-south direction. Null points are found onthe 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 dip iszero. What is the total magnetic field on the normal bisector of themagnet at the same distance as the null–point (i.e., 14 cm) from the centre of the magnet? (At null points, field due to a magnet is equal and opposite to the horizontal component of earth’s magnetic field.)

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