Page 150 - SCERT Kerala State Syllabus 8th Standard Basic Science Textbooks English Medium Part 1_Neat

A B
Fig. 11.5
Bring the end A (north pole) of the magnetised hacksaw blade
near the north pole of a magnetic needle. What do you observe?
Now, break a small portion of the hacksaw blade from near the
north pole carefully. Will there be a north pole at the remaining
end? Examine this using a magnetic needle. Record your
findings in your science diary.
See if it is possible to break the end of the blade again and
again carefully, till the south pole alone is left. What is your
inference?

Bring both ends of the broken pieces near the magnetic needle
and observe what happens. Write down your inference in the
science diary.

Fig. 11.6
Every magnet, however small it may be, has two poles.
Making a monopole magnet has not yet been possible.
Won’t a magnet attract a magnetic substance when brought
close to it?

How can we find the region around a magnet where the
influence of the magnet is felt?
Magnetic field

Fix a drawing sheet of size about 30 cm length and 30 cm
breadth on a surface. Place a compass in the middle of the
drawing sheet. Mark the north and south poles of the
magnetic needle on the paper. Draw a straight line
Fig. 11.7

Basic Science VIII 149