The DAV Class 6 Science Book Solutions and DAV Class 6 Science Chapter 13 Question Answer – Magnets are essential study tools for DAV public school students in Class 6.
DAV Class 6 Science Ch 13 Question Answer – Magnets
DAV Class 6 Science Ch 13 Solutions – Magnets
Something To Know
A. Fill in the blanks.
Question 1.
The materials which do not get attracted towards a magnet are called______
Answer:
Non-magnetic materials
Question 2.
The bar magnet is an example of a______ magnet.
Answer:
Artificial magnet
Question 3.
Even the smallest piece of a magnet has two ______
Answer:
Poles
Question 4.
Earth has its magnetic ______ towards the geographical south pole.
Answer:
North
Question 5.
Magnets have been used for ______ purposes.
Answer:
Navigation
B. Write True or False for the following statements.
1. Naturally occurring magnets are called loadstones.
2. An aluminium foil would get attracted by a magnet.
3. Bar magnets have a ‘north seeking’ pole as well as a ‘south seeking pole’
4. Two magnetic poles, of the same kind, attract each other.
5. When two magnets are moved farther apart from each other, the forces, that attract or repel them, tend to become stronger.
Answer:
1. Naturally occurring magnets are called loadstones. (True)
2. An aluminium foil would get attracted by a magnet. (False)
3. Bar magnets have a ‘north seeking’ pole as well as a ‘south seeking pole’ (True)
4. Two magnetic poles, of the same kind, attract each other. (False)
5. When two magnets are moved farther apart from each other, the forces, that attract or repel them, tend to become stronger. (False)
C. Tick (✓) the correct option.
1. The magnetic material, that was discovered first of all, is
(a) Iron
(b) Steel
(c) Loadstone
(d) Cobalt
Answer:
(c) Loadstone
2. A magnet can attract
(a) A glass object
(b) A flower
(c) A book
(d) An iron nail
Answer:
(d) An iron nail
3. A material, that is often used to make a temporary magnet, is
(a) Steel
(b) Alnico
(c) Ticanol
(d) Soft iron
Answer:
(d) Soft iron
4. When we suspend a bar magnet from a thread, it comes to rest along the
(a) North-west direction
(b) East-west direction
(c) South-east direction
(d) North-south direction
Answer:
(d) North-south direction
5. A device, which generally does not use a magnet, is
(a) A CD player
(b) A telephone
(c) A geyser
(d) An electric motor
Answer:
(d) An electric motor
D. Answer the following questions in brief.
Question 1.
State any two properties of a bar magnet.
Answer:
Two properties of a bar magnet are as follows:
(a) The bar magnet always points in N—S direction, when suspended freely.
(b) The bar magnet attracts magnetic materials.
Question 2.
Maximum iron fillings stick to the two ends of a bar magnet. Why?
Answer:
The magnetic strength is the maximum at two ends (poles) of a bar magnet. That is why maximum iron fillings stick to the two ends of a bar magnet.
Question 3.
Suppose we bring the north pole of the magnet towards the north pole of another freely suspended magnet. What are we likely to observe?
Answer:
In case, the north pole of a magnet is brought near the north pole of another freely suspended magnet, the freely suspended magnet would be repelled. This happens because like poles repel each other.
Question 4.
Two magnets X and Y, are placed as shown in the diagram. It is observed that magnet X floats above magnet Y. Give reason for this observation.
Answer:
The like poles of both the magnets are facing each other. Hence, the magnets are repelling each other. This is the reason the magnet X is floating above the magnet Y.
Question 5.
You are given a knitting needle (of steel). How can you make it into a magnet?
Answer:
For making a magnet from a knitting needle of steel, we should suspend it in the N – S direction and hammer it gently starting from one end. Hammering should be repeated many times. This will convert the needle into a magnet.
E. Answer the following questions.
Question 1.
Distinguish between the following.
(a) Permanent magnets and temporary magnets
| Permanent Magnet | Temporary Magnet |
| They retain their magnetic property for a long duration. | They retain their magnetic property for a very short duration. |
| Example; Bar magnet | Example: Electromagnet |
(b) Magnetic and non-magnetic materials
Answer:
- Magnetic Material: Materials which can be attracted by a magnet are called magnetic materials, e.g. iron, nickel.
- Non-Magnetic Material: Materials which cannot be attracted by a magnet are called non-magnetic materials, e.g., aluminium, tin.
Question 2.
Two bar magnets, T’ and ‘Q’ are kept as shown in the following diagram.
(a) If Point ‘c’ represents the south pole of the magnet Q, which point represents the north pole of magnet P?
Answer:
Point a.
(b) What will happen when the end ‘d’ of magnet ‘Q’ is brought towards the end ‘b’ of magnet ‘P’?
Answer:
Both magnets would attract each other.
Question 3.
Describe, in brief, the constructions of a compass needle. State its main use.
Answer:
Compass needle is a simple device which has been in use for finding direction. The compass needle is fixed on a pivot on which it can freely move. This is enclosed in small box; covered with glass top. The compass needle always points in N-S direction and thus can be used for finding directions.
Question 4.
Draw a labelled diagram to show the ‘proper way of storing two bar magnets’, when they are not in use. State the advantage of such a ‘proper storing’.
Answer:
Advantage of proper storage of magnets:
- Helps in preserving the magnetism in a magnet.
- Helps in prolonging the life of a magnet.
Question 5.
Write the different ways through which magnets can be made to lose their magnetism.
Answer:
Magnets can lose their magnetism in the following ways:
- By heating
- By dropping
- By hammering
6. Anushtha saw a steel clip at the bottom of a very shallow puddle of water. She used a magnet, to take out this clip, without wetting her hands, or the magnet. Describe how she must have done this.
Answer:
She used the magnetic property of magnet. A magnet can attract an iron object even from a distance. Hence, Anushtha was able to pull the steel clip without wetting her hands or the magnet.
Value Based Questions
Aryan, the son of an ‘Army man’, always behaved, towards others, in a polite, helpful and considerate way. He was also a very hard working and disciplined boy. When his father was transferred to a new location, he too had to move to a new school. He soon had many friends in his new school. His teachers would often say:
‘Aryan’s personality helps him to attract friends in the same way as a magnet attracts iron objects towards it.’
Question 1.
State the qualities of Aryan’s personality, that you would yourself like to have.
Answer:
Friendly nature, discipline
Question 2.
State one practical use of a magnet’s property of attracting iron objects.
Answer:
Magnets are used for lifting heavy objects.
Question 3.
Have a ‘story telling game’ in which the participants think of a situation in which a person’s
(a) Kind/polite nature
(b) Helpful nature
(c) Hard working nature And so on helps her/him, in one way or the other.
Answer:
Do it yourself.
Something To Do
Question 1.
Design a colourful maze on a gameboard made of cardboard. Your maze should include a ‘start’ and a ‘finish’ line and a path wide enough for a steel paper clip to move through it. Draw, and colour, your favourite characters on a thick piece of paper. Make a ‘cut out’ of these and fit them into paper clips. Keep one of your ‘cut out’ at the ‘start’ line and move it through the maze using a magnet held below the ‘gameboard’. The student, who moves the ‘cut out’, through the maze, to the ‘finish’ line, in the shortest duration of time, wins the game.
Answer:
Do it yourself.
Question 2.
‘Discovery of magnets has improved our quality of life’. Do you agree with this? Write your views on a piece of paper and share your views with your friends.
Answer:
Yes, discovery of magnets has improved our quality of life. For example, the compass needle has helped humankind in long distance voyages since ancient times. Many modern gadgets use magnet, e.g. electric motor and speakers. Recording devices; like CD, floppy, etc. use magnet for recording.
Question 3.
Is soil a magnetic or a non-magnetic material? Find it out by collecting samples from different parts of the colony/city. List the findings in a tabular form as shown below.
| Name of location | Did you find iron-fillings sticking to the soil? (none/few/many) |
Answer:
Take soil sample and keep it near the bar magnet. If the soil sample contains iron particle, they will stick to the magnet. Soil at certain places contain iron.
Question 4.
Suppose you are given two equal sized iron rods, one of which is a magnet while the other is not. Both the rods are similarly painted and have identical appearance. Imagine that you do not have any other object with you and you do not know which way the ‘north’ direction is. How will you be able to determine which rod is magnetic and which rod is non-magnetic? (Hint: Use the ‘maximum strength at the poles’ property of a magnet.)
Answer:
Suspend both the rods separately by a thread. The thread should be tied in the middle of each rod. Allow each rod to come to rest. The rod which always points towards north- south direction is the magnetic rod. Repeat this activity at least four times to confirm the magnetic rod.
DAV Class 6 Science Chapter 13 Solutions – Magnets
I. Fill in the blanks.
Question 1.
Magnet was discovered about ______ years ago.
Answer:
1. 4000
Question 2.
Magnet was discovered in Magnesia which is in ______
Answer:
Greece
Question 3.
Magnetite is also called ______
Answer:
Loadstone
Question 4.
A bar magnet has ______ poles.
Answer:
Two
Question 5.
Iron is a ______ material.
Answer:
Magnetic
Question 6.
Aluminium is a ______ material.
Answer:
Non-magnetic
II. Tick (✓) the correct option.
1. Magnet was discovered in which country?
(a) Rome
(b) Greece
(c) Italy
(d) F ranee
Answer:
(b) Greece
2. Which of these is a magnetic material?
(a) Iron
(b) Nickel
(c) Cobalt
(d) All of these
Answer:
(d) All of these
3. Which of these is a non-magnetic material?
(a) Aluminium
(b) Zinc
(c) Rubber
(d) All of these
Answer:
(d) All of these
4. Magnet is present in which of these devices?
(a) Speaker
(b) Electric iron
(c) Toaster
(d) Geyser
Answer:
(a) Speaker
III. Answer the following questions.
Question 1.
What do you understand by loadstone?
Answer:
A long piece of magnetite (natural magnet) always points in one particular direction only; when suspended freely. Due to this, magnetite is also called ‘loadstone’.
Question 2.
What do you understand by magnetic materials?
Answer:
Materials which can be attracted by a magnet are called magnetic materials, e.g. iron, nickel, steel, cobalt and alloys of certain metals.
Question 3.
What are the various shapes of artificial magnet?
Answer:
Bar magnet is most commonly used shape of magnet. Apart from that, artificial magnets are also made in the shape of horse-shoe, needle, ball-ended and circular magnets.
Question 4.
What do you understand by permanent magnet?
Answer:
A magnet which retains its magnetic property for a long time is called permanent magnet.
Question 5.
What do you understand by temporary magnet?
Answer:
A magnet which retains its magnetic property for a short duration is called temporary magnet. Temporary magnets can be made very strong; compared to permanent magnets.
Question 6.
Explain the magnetic property of earth.
Answer:
The earth also has magnetic property. Its north pole is near its geographic south, while its south pole is near its geographic north.
IV. Projects
Question 1.
Make a labeled diagram of a bar magnet in your scrapbook.
Answer:
Do it yourself.
Question 2.
Make a hst of appliances in which magnets are used.
Answer:
Do it yourself.