A strong bar magnet is placed vertically above a horizontal wooden board. The magnetic lines of force will be :

The magnetic lines of force inside a bar magnet

the magnetic lines of force inside a bar magnet

The magnetic lines of force due to the bar magnet

If a paramagnetic substance is placed in a magnetic firld then magnetic lines of force will

A 6cm long bar magnet possesing magentic dipole moment 0*3Am^2 is placed vertically on a horizontal wooden table with north pole of magnet touching the table. A neutral point is found on the table at a distance of 8cm south of the magnet. Calculate the horizontal component of earth's magnetic field.