Chapter 13 Fun with Magnets

By | July 14, 2018

Class 6 | Science | Chapter 13| Fun with Magnets | NCERT Solutions

Question 1. 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 1  (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.

(v) A magnet always has two poles.

Question 2. 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 2 (i) A cylindrical magnet has only one pole. (False)

(ii) Artificial magnets were discovered in Greece. (False)

(iii) Similar poles of a magnet repel each other. (True)

(iv) Maximum iron filings stick in the middle of a bar magnet when it is brought near them. (False)

(v) Bar magnets always point towards North-South direction. (True)

(vi) A compass can be used to find East-West direction at any place. (True)

(vii) Rubber is a magnetic material. (False)

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 3 The blade of a sharpener is made up of iron.Iron is a magnetic material that is why it is attracted by the poles of magnet.

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.

Column IColumn II
N- N______________
N – ___Attraction
S – N______________
__ – SRepulsion

Answer 4

Column IColumn II
N- NRepulsion
N –SAttraction
S – NAttraction
S– SRepulsion

Question 5. Write any two properties of a magnet.

Answer 5 The two properties of magnet are:

1) Opposite poles of two magnet attract each other while like poles of two magnet repel each other.

2) A freely suspended magnet always aligns in N-S direction.

Question 6. Where are poles of a bar magnet located?

Answer 6 The poles of bar magnet are located at its two end points.

poles of magnet
Question 7. A bar magnet has no markings to indicate its poles. How would you find out near which end is its north pole located?

Answer 7 A freely suspended bar magnet always come to rest in the North-South direction.The north facing end of magnet is its north pole and the south facing end of magnet is its south pole.

Question 8. You are given an iron strip. How will you make it into a magnet?

Answer 8 Take an iron strip and place it on the table. Now take a bar magnet and place one of its poles near one edge of the strip of iron. Without lifting it, move it along the length of the iron strip till you reach the other end. Now lift the magnet and bring the pole to the same point of the strip from where you began. Repeat the same process for about 40-50 times. Now you have made the iron strip to act as a magnet. To verify, bring some iron fillings near the iron strip. The strip will attract the fillings just like a magnet.

Question 9. How is a compass used to find directions?

Answer 9 A compass needle always point towards the North-South direction.The red arrow of the compass needle indicate the north pole.If we know the north direction , then we can find all other three directions at that place.

magnetic compass

Question 10. A magnet was brought from different directions towards a toy boat that has been floating in water in a tub. Affect observed in each case is stated in
Column I. Possible reasons for the observed affects are mentioned in
Column II. Match the statements given in Column I with those in Column II.

Column IColumn II
Boat  gets attracted towards the magnetBoat is fitted with a magnet with north towards its head
Boat is not affected by the magnetBoat is fitted with a magnet with south towards its head
Boat moves towards the magnet if north pole of the magnet is brought near its head.Boat has small magnet fixed along its length
Boat moves away from the magnet when north pole is brought near its head.Boat is made of magnetic material
Boat floats without changing its directionBoat is made up of non magnetic material

Answer 10 

Column IColumn II
Boat gets attracted towards the magnetBoat is made of magnetic material
Boat is not affected by the magnetBoat is made of non-magnetic material
Boat moves towards the magnet if north pole of the magnet is brought near its head.Boat is fitted with a bar magnet with south pole towards its head.
Boat moves away from the magnet when north pole is brought near its head.Boat is fitted with a bar magnet with north pole towards its head.
Boat floats without changing its directionBoat has a small magnet fixed along its length.

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