NCERT TEXTBOOK EXERCISES
(Pages 134-135)
Question 1.
Fill up the blanks:
(a) Artificial magnets are made in different shapes such as ______, ______ and ______.
Answer:
- U-shaped
- Cylindrical
- Base shaped
(b) The materials which are attracted towards the magnet are called ______.
Answer:
Magnetic
(c) Paper is not a ______ material.
Answer:
Magnetic
(d) In the olden day’s sailors used to find direction by suspending a piece of ______.
Answer:
Magnet
(e) A magnet always has ______ poles.
Answer:
Two
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 :
(i) False
(ii) True
(iii) True
(iv) False
(v) True
(vi) False
(vii) 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 :
Iron might have been used to make some part of a pencil sharpener.
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 I | Column II |
| N-N | ……………… |
| N-….. | Attraction |
| S-N | ………………. |
| …..-S | Repulsion |
Answer :
| Position of two magnets | Behavior |
| N-N | Repulsion |
| N-S | Attraction |
| S-N | Attraction |
| S-S | Repulsion |
Question 5.
Write any two properties of a magnet.
Answer:
Properties of a magnet are:
- The magnet has two poles-north poles and a south pole.
- Same poles repel each other and different poles attract each other.
Question 6.
Where are the poles of a bar magnet located?
Answer :
Poles of a bar magnet are located at the ends.
When a bar magnet is placed near some iron filings, we observe more iron filings clinging to the magnet near its ends.
See Figs. 13.3 and 13.4(a).
The ends of a magnet where maximum iron filings get clung, i.e., the attraction is strongest, are known as poles.
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 :
We will suspend the bar magnet. It will come to rest in a north-south direction. The end of the magnet pointing towards the north direction is called a north pole.
Question 8.
You are given an iron strip. How will you make it into a magnet?
Answer :
We can convert an iron strip by repeatedly stroking it by a bar magnet systematically. Take the iron strip and keep it on a wooden table. Stroke it with one pole of a bar magnet in one direction. When you reach the other end of the iron strip, lift the magnet and bring the same pole back to the starting end of the iron piece, stroke again, in the same direction. Repeat this process about 30-40 times. After that check the iron strip whether the iron strip has now become a magnet. If not, continue the process for some more time. Remember the pole of the magnet and the direction of stroking is not to be changed. In the same way, the iron needle can also be converted into a magnet.
Question 9.
How is a compass used to find directions?
Answer :
The compass is kept at the place where we want 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. Thus north and south directions are identified.
Question 10.
A magnet was brought from different directions towards a toy boat that has been floating in water in a tub. The effect observed in each case is stated in Column I. Possible reasons for the observed effects are mentioned in Column II. Match the statements given in Column I with those in Column II,
| Column I | Column II |
| Boat gets attracted towards the magnet | Boat is fitted with a magnet with north pole towards its head |
| Boat is not affected by the magnet | Boat is fitted with a magnet with south pole towards its head |
| Boat moves towards the magnet if north pole of the magnet is brought near its head | Boat has a 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 direction | Boat is made up of non-magnetic material |
Answer :
| Column I | Column II |
| Boat gets attracted towards the magnet | Boat is made up of magnetic material |
| Boat is not affected by the magnet | Boat is made up 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 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 magnet with a north pole towards its head |
| Boat floats without changing its direction | Boat has a small magnet fixed along its length |
We hope the NCERT Solutions for Class 6 Science Chapter 13 Fun with Magnets help you. If you have any query regarding NCERT Solutions for Class 6 Science Chapter 13 Fun with Magnets, drop a comment below and we will get back to you at the earliest.
Extra Questions for Class 6 Science Chapter 13 Fun with Magnets with Answers Solutions
Fun with Magnets Class 6 Extra Questions Very Short Answer Type
Question 1.
Name two magnetic materials
Answer:
Iron and cobalt
Question 2.
Name the first magnet.
Answer:
Lodestone
Question 3.
Name three non-magnetic materials.
Answer:
Paper, plastic and clay.
Question 4.
How many poles are there in a magnet?
Answer:
Two
Question 5.
Can we have an isolated north or south pole?
Answer:
No
Question 6.
Which is the north pole of a bar magnet?
Answer:
It is the tip of a bar magnet that points towards the north direction.
Question 7.
In which direction the pointed end of the needle of a compass always points?
Answer:
North
Question 8.
Where is the attraction maximum in the magnet?
Answer:
Attraction is maximum at the poles.
Question 9.
How can you separate a magnetic substance from a mixture?
Answer:
By using a bar magnet, the magnetic substance is separated from a mixture.
Question 10.
In which direction does a suspended magnet come to rest?
Answer:
North-south direction
Question 11.
To which part of the magnet do none or only a few iron filings stick?
Answer:
Minimum number of iron filings stick to the middle part of the magnet.
Question 12.
What happens when similar poles come close to each other?
Answer:
They repel each other
Question 13.
Which property of a magnet is used for the testing of permanent magnet?
Answer:
Repulsion property
Question 14.
Permanent magnets do not loose their magnetism even after a long period of time. Is it true or false?
Answer:
True
Question 15.
What should be kept in between the bar magnets while storing?
Answer:
A piece of wood.
Fun with Magnets Class 6 Extra Questions Short Answer Type
Question 1.
What is a magnet? Mention their classification.
Answer:
A magnet is a substance that has the property of attracting objects made of iron, cobalt and nickel. On the basis of their occurrence, the magnets can be classified as:
(a) Natural magnets
(b) Artificial magnets.
Question 2.
What are magnetic materials? Explain with examples.
Answer:
Magnetic materials are those materials which get attracted to magnets. For example, materials made of metals as iron, nickel, cobalt, etc.
Question 3.
What are non-magnetic materials? Explain with examples.
Answer:Non-magnetic materials are those materials that do not get attracted to magnets. For example, paper, wood, plastics, etc.
Question 4.
What are properties of magnets?
Answer:
The properties of magnets are:
- It attracts iron pieces towards itself.
- It always aligns itself in the same direction if allowed to rotate freely.
- It is composed of oxides of iron (Fe304).
Question 5.
Categorise the given substances into two groups-magnetic and non-magnetic.
Key, Glass, Wood, Nail, Book, Rubber, Fork, Sand, Iron particles, Chalk, Alpin
Answer:
| Magnetic | Non-magnetic |
| Key, Alpin, Iron particles, Nail | Glass, Wood, Chalk, Fork, Book, Rubber, Sand |
Question 6.
Why does bar magnet always point in north-south direction?
Answer:
Bar magnet always points in north-south directions when left freely suspended because earth itself behaves likes a magnet and north pole of bar magnet is attracted towards south pole of earth’s magnet and vice-versa.
Question 7.
What are the poles of magnet?
Answer:
A magnet has two ends. They are called poles of magnet. One is north pole (N) and the other is the south pole (S).
Question 8.
What is magnetic field?
Answer:
The area around a magnet where its effect can be felt is known as magnetic field. It is more at the poles.
Question 9.
What are temporary magnets?
Answer:
There are some magnets that lose their property of magnetism after a short period of time. These are called as temporary magnets.
Question 10.
What are the ways by which a magnet can be demagnetized?
Answer:
Ways by which a magnet can be demagnetized are:
- Throwing or dropping the magnet from a height.
- Heating the magnet.
- Hammering the magnet.
- Improper storing
Question 11.
How should we store a magnet?
Answer:
A magnet also loses its magnetism if it is not stored properly. Bar magnets must always be stored in pairs with their opposite poles on the same side. A piece of wood is kept in between to separate them. In case of horse-shoe magnet, a single magnet keeper should be kept in such a way that it should touch both the poles of the magnet.
Question 12.
What are permanent magnets?
Answer:
The magnets that do not lose their property of magnetism even after a long period of time are called permanent magnets.
Question 13.
Can we isolate north pole or south pole of a magnet? Give reason.
Answer:
No, we cannot isolate north pole of a magnet from its south pole or vice-versa. If we break a bar magnet into two halves, we will not get a single north or south pole but two magnets each with its north and south poles.
Question 14.
Draw the diagram of
(a) Bar magnet
(b) Horse-shoe magnet.
Fun with Magnets Class 6 Extra Questions Long Answer Type
Question 1.
Differentiate between magnetic and non-magnetic materials.
Answer:
| Magnetic materials | Non-magnetic materials |
| (i) They are those materials which get attracted to magnets. | (i) They are those materials which do not get attracted to magnets. |
| (ii) They are usually made of metals. | (ii) They are usually not made up of metals. |
| (iii) They can be converted into magnets. | (ii) They cannot be converted into magnets. |
| (iv) Examples are iron, nickel, cobalt, etc. | (iv) Examples are paper, wood, stone, plastic, etc. |
Question 2.
List the properties of poles of the magnet.
The poles of a magnet have some very important properties. They are:
- A freely suspended magnet always comes to rest in the north-south direction.
- Attraction is maximum at the poles of a magnet. It is because these points have maximum magnetic strength. On moving towards the centre, the magnetic power keeps on decreasing.
- Both the poles of a magnet have approximately same capacity to attract.
- Two poles of a magnet can never be separated. This means that the poles of a magnet always exist in pair in a piece of a magnet.
- Similar poles repel each other while the dissimilar poles attract each other.
Question 3.
How was magnet discovered?
Answer:
Once upon a time in Greece, there lived a shepherd named Magnes. He used to take his herd of sheep and goats to the nearby mountains for grazing. He used to carry a stick with small piece of iron attached to it for controlling his herd. One day he was surprised to find that he had to pull hard to free his stick from a rock on the mountainside. The rock was a natural magnet that attracted the iron tip of the shepherd’s stick. This was how magnet was discovered. Such rocks were given the name magnetite, perhaps after the name of that shepherd.
Question 4.
How can we convert an iron strip into a temporary magnet?
Answer:
The procedures for converting an iron strip into a temporary magnet are:
- Keep the iron strip on a solid surface.
- Take the bar magnet and gently rub it along the length of the iron strip.
- Repeat this activity for about 20 – 30 times.
- In order to test whether the iron strip has become a magnet or not, bring some iron nails near it and observe.
In this way, an iron strip can be converted into a temporary magnet.
Question 5.
What are the uses of magnets?
Answer:
The uses of magnets are as follows:
- ATM, credit and debit cards have a magnetic strip that stores information and enables transactions of money.
- Magnetic recording devices such as VHS, audio cassettes, computers, floppy disks and hard disks have magnets for recording data.
- Magnets are used in junk yards to separate iron objects other waste materials.
- Magnetic compass is used to find directions. It has a small magnetic needle at its centre.
- Maglev or Magnetic levitation trains have been developed in America. These trains are without wheels and move a little above the rails.
- The trains are pulled by the magnetic force that acts on the rails.
Fun with Magnets Class 6 Extra Questions HOTS
Question 1.
How do the ragpickers collect iron object from roads and waste materials?
Answer:
Ragpickers carry a huge magnet with them suspended with a thread. Whenever they bring the magnet near the heap of wastes having iron pieces, they stick to the magnet.
Question 2.
Why is compass needle is kept in a glass casing?
Answer:
As compass needle is a small and thin magnetised needle, it can get affected by the air and dust setting on it. So to avoid any kind of hindrance by outer environment compass needle is kept in a glass casing.
Question 3.
You are given two rods. Out of these, one is an iron rod and the other one is magnet, how will you identify these rods?
Answer:
Take both the rods and suspend them separately. Bring one end of a bar magnet close to both the ends of the suspended rod. If it shows attraction at both the ends then it is an iron rod. If it shows attraction at one end and repulsion at the other end then it is a bar magnet.
Fun with Magnets Class 6 Extra Questions Value Based (VBQs)
Question 1.
Sarika went to a fair nearby her house. She saw a stall with lots of people gathering there playing some game. She also went there. The game was to put a small iron ball into a hole named as ‘prize’ and if somebody does so they will win a great prize for that. There were 3 more holes adjacent to the ‘prize’ hole which do not have any gift or prize. Nobody was able to put the ball into the prize hole. Sarika got the trick of the shopkeeper that he had put a magnet near the mouth of each hole except the ‘prize’ hole. She made all the people aware of the wicked trick made by the shopkeeper. All of them praised Sarika for her intelligence.
(a) What is a magnet?
(b) Name any three types of magnet.
(c) What values of Sarika is shown here?
Answer:
(a) Substance that has the property of attracting object made of iron, cobalt and nickel is magnet.
(b) Three types of magnet are bar magnet, U-shaped magnet and ring or disc-shaped magnet.
(c) Sarika is an intelligent, self-aware, helpful and knowledgeable girl.
Question 2.
Aslam with his mother went to the market to buy some fresh vegetables. Aslam’s mother asked the shopkeeper to give 1 kg tomatoes. While the shopkeeper was weighing tomatoes, Aslam observed something attached below one of the pan of the beam balance. He at once informed this to his mother. His mother scolded the shopkeeper for using unfair meAnswer:The shopkeeper felt sorry for this.
(a) What do you think was attached below the pan of a beam balance by the shopkeeper?
(b) What are the other uses of the thing you have mentioned above?
(c) What values of Aslam is shown here?
Answer:
(a) Magnet was attached to the pan of the beam balance.
(b) Magnets are used in refrigerator, tape recorder, CD, TV, etc.
(c) Aslam is alert, intelligent, aware and conscious boy.