6. Spread some iron filings and place a bar magnet in it, the iron filings will
a. cling to one end only
b. spread uniformly over the magnet
c. ding to each end of the magnet mostly and few near middle
d. cling to the centre
Answers
Answer:
Fill in the blanks in the following
(i) Artificial magnets are made in different shapes such as __________, __________ and ____________.
(ii) The Materials which are attracted towards a magnet are called________.
(iii) Paper is not a ______ material.
(iv) In olden days, sailors used to find direction by suspending a piece of
___________.
(v) A magnet always has __________ poles.
Answer:
(i) Artificial magnets are made in different shapes such as bar-magnet, cylindrical magnet and horse-shoe magnet.
(ii) The Materials which are attracted towards a magnet are called magnetic material.
(iii) Paper is not a magnetic material.
(iv) In olden days, sailors used to find direction by suspending a piece of bar-magnet.
Question2.
State whether the following statements are true or false
(i) A cylindrical magnet has only one pole.
(ii) Artificial magnets were discovered in Greece.
(iii) Similar poles of a magnet repel each other.
(iv) Maximum iron filings stick in the middle of a bar magnet when it is brought near them.
(v) Bar magnets always point towards North-South direction.
(vi) A compass can be used to find East-West direction at any place.
(vii) Rubber is a magnetic material.
Answer:
A cylindrical magnet has only one pole- False
Explanation:
Poles always exist in pairs in a magnet.
Artificial magnets were discovered in Greece- False
Explanation: -
Natural magnets were discovered in Greece.
Similar poles of a magnet repel each other- True
Explanation:-
Like poles repel each other and unlike poles repel attract each other.
Maximum iron filings stick in the middle of a bar magnet when it is brought near them-False
Explanation:-
Maximum iron fillings will stick to the ends of the bar magnet because at the ends of the magnet poles are located.
The strength of the poles is maximum at the ends of the magnet.
Bar magnets always point towards North-South direction-True

Explanation:-
A freely suspended magnet always aligns itself in North-South direction.
A compass can be used to find East-West direction at any place- True
Explanation: -
Always the needle of the compass points towards North-South direction. So if North-South direction is known then East-West direction can also be known.
Rubber is a magnetic material-False
Explanation: -
Rubber is an insulator. It cannot be attracted or repelled by a magnet.
Question 3.
It was observed that a pencil sharpener gets attracted by both the poles of a magnet although its body is made of plastic.
Name a material that might have been used to make some part of it.
Answer:
The blade of sharpener is made up of iron.
Iron is a magnetic material because of this pencil sharpener gets attracted by the poles of a magnet although the body is made up of plastic.

Question 4.
Column I shows different positions in which one pole of a magnet is placed near that of the other.
Column II indicates the resulting action between them for each situation. Fill in the blanks.

Answer:

Like magnetic poles repel each other, while unlike magnetic poles attract each other.
Question 5.
Write any two properties of a magnet.
Answer:
Magnets have two poles i.e. North Pole (N) and South Pole(S).
A freely suspended magnet always aligns in N-S direction
Question 6.
Where are poles of a bar magnet located?
Answer:
The poles (north and south) of bar magnet are located at extreme ends of the bar magnet.

Question 7.
A bar magnet have no markings to indicate its poles. How would you find out near which end is its north pole located?
Answer:
Tie a bar magnet to a thread and suspends it freely. When suspended freely it will always align itself in north-south direction.
So the end that points to the north direction will be considered as the north pole of the magnet and the end
which points to the south direction will be its south pole.

Question 8.
You are given an iron strip. How will you make it into a magnet?
Answer:
“Touch and Stroke” method is used to make an iron strip into a magnet.
Take a rectangular piece
Answer:
Dlung to each end of the magnet mostly and few near middle