Magnetic effect of the earth. The earth behaves as it has

got a big magnet, running as mot a big magnet, running

almost from its north to south pole inside it (the earth).

Its south pole lies towards the geographical north pole and

the north pole lies towards the geographical south pole. As

a matted of fact, there is no such magnet inside it, but our

earth, as a whole, acts as a big magnet, we can prove this

fact with the help of the following experiments.

(1) one can magnetise iron

?rods by the earth. This is possible only when the earth

behaves like magnet or it has got magnetic material (a big

magnet) inside it.

(2)when we suspend a magnet.

Freely, it always rests in a particular direction almost

coinciding with the north and the south direction. It is

only possible when we presume that there is magnet inside

the earth of which north elope is towards soothe pole of

geography and south pole is towards geographical north pole.