Page 158 - SCERT Kerala State Syllabus 8th Standard Basic Science Textbooks English Medium Part 1_Neat

2. Figures A and B show two iron nails each hanging from a bar
magnet and a U shaped magnet.
(a) Identify the correct picture in A and B.

(b) Justify your answers.

A

B

3. You are given a soft iron piece, a steel piece of the same
size, insulated copper wire and a battery.

(a) Explain how a strong permanent magnet can be made.
(b) Suggest a method to make a temporary magnet.
4. Can you build a compass and make it work by arranging a
magnetic needle in such a way that it rotates freely inside
an iron case? What is the reason?

5. In an exhibition, a plastic car with an iron piece fixed inside
it is made to run on a wooden table by sliding a strong
magnet below it. The experiment failed when a steel table
was used instead. Explain the reason.

Basic Science VIII 157