Draw the lines of force of a bar magnet neglecting the earth's magnetic field.

Two lines of force due to a bar magnet

The lines of force of uniform magnetic field

When N- pole of the given bar magnet is placed on a table pointing geographic north,the null points are formed due to the superposition of the magnetic field of the "bar" magnet and the earth's magnetic field. The two null points are located

the magnetic lines of force inside a bar magnet

Write the following steps in a sequence to locate the neutral points when south pole of a bar magnet is placed towards geographical north. (A) Draw the magnetic lines of force due to the bar magnet by using a magnetic compass (B) locate the north the south poles of a bar magnet by using a magnetic compass (C) placea bar magnet on the white paper such that the south pole of the bar magnet point towards geographic north (D) Note the points the magnetic field where the magnetic compass does not show any particular direction

The time period of a bar magnet suspended horizontally in the earth's magnetic field and allowed to oscillate