Fill in the following blanks with suitable words:
(a) Magnetic field lines leave the...........pole of a bar magnet and enter at its.........pole.
(b) The earth's magnetic field is rather like that of a ..........magnet with its ........... pole in the northern hemisphere.
A short bar Magnet with its north pole facing North forms a neutral point P in the horizontal plane. If the magnet is rotated by 900 in the horizontal plane, the net magnetic induction at P is:
(Horizontal component of earths magnetic field is BH)