CBSE Class 6 Science Chapter 13 : Fun with Magnets NCERT Solutions

CBSE Class 6 Science 

Chapter 13 :  Fun with Magnets

NCERT Solutions

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

(i) horse shoe, bar and cylindrical

(ii)  magnetic materials

(iii)  magnetic
(iv) bar magnet or lode stone

(v)  two

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

(i) False

(ii) True

(iii)True 

(iv) False

 (v) True

(vi) True

(vii) False.

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 Iron is used to make the blade in the pencil sharpener, which is getting attracted to the magnet.

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:
N - N  Repulsion
N - S   Attraction
S - N   Attraction
S - S    Repulsion

5. Write any two properties of a magnet.

Answer:

• In magnets, the like poles attract each other and unlike poles repulse each other
• When a magnet is freely suspended, it came into rest point pointing towards North- South direction

6. Where are poles of a bar magnet located?

Answer:

The poles of a bar magnet is located at the extreme ends of the magnet.

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:

In order find the pole of the magnet, suspend the magnet freely with a thread. The side of the bar magnet, pointing towards the geographical north is the north pole of the magnet.

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

Answer:

Take a rectangular piece of iron. Place it on the table. Now take a bar magnet and place one of its poles near one edge of the bar of iron. Without lifting the bar magnet, move it along the length of the iron bar till you reach the other end. Now, lift the magnet and bring the pole to the same point of the iron bar from which you began. Move the magnet again along the iron bar in the same direction as you did before.  Repeat this process about 30-40 times. Now we can notice that the iron strip is acting as a magnet.

9. How is a compass used to find directions?

Answer:

 A compass is usually a small box with a glass cover on it. A magnetized needle is pivoted inside the box, which can rotate freely.  The compass also has a dial with directions marked on it. The compass is kept at the place where we wish to know the directions. Its needle indicates the north-south direction when it comes to rest. The compass is then rotated until the north and south marked on the dial are at the two ends of the needle.  To identify the north-pole of the magnetic needle, it is usually painted in a different colour

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.

Answer: