FUN WITH MAGNETS
Question 1
State True or False
(a) Magnetism of a magnet is lost by hammering and heating
(b) Magnetite is a natural magnet
(c) A cylindrical magnet has only one pole
(d) Poles always exists in pair
(e) Like poles repel each other
(f) Opposite poles of a magnet attract each other
g) Wood is a non-magnetic Material
h) Plastic is a magnetic Material
i) If a bar magnet is cut into four pieces along its length, then 4 N and 4 S will be formed
Question 2:
Fill in the blanks
1) _________is a device used by pilots and navigators used to find the direction
2) Nickel is a ________ Material
3) Magnets are named after _______________
4) silver is a _____________ Material
5) _______________ is the surest test of Magnetism
6) ____________ type of magnet is used in cranes to lift heavy containers from ships.
3. Name the following :-
1. Name the substances from which artificial magnets are made.
2. Name two poles of a magnet.
3. Name the method to magnetize a piece of iron.
4. Define :-
(1) Magnetic compass
5. Distinguish between
(1) Magnetic & non magnetic substances
(2) Natural & artificial magnet.
6. Answer the following:
i. A natural magnet.
ii. Any one pole of a magnet.
iii. A magnetic material.
iv. A non magnetic material.
v. A device used by sailors to find out directions –
vi. Any one shape of an artificial magnet.
vii. Place where natural magnets were discovered.
viii.Total number of poles in a cylindrical magnet.
ix. Magnet that retain magnetism for short period of time
7. Few iron nails and screws got mixed with the wooden shavings while a carpenter was
working with them. How can you help him in getting the nails and screws back from the scrap
without wasting his time in searching with his hands?
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