RBSE Class 6 Science Chapter 4 Solutions in English — Exploring Magnets

RBSE Class 6 Science Chapter 4 Question Answer Exploring Magnets

By tackling theseRBSE Class 6 Science Solutionsand RBSE Class 6 Science Chapter 4 Exploring Magnets Question Answer in English Medium, students will build a solid foundation in the topic.

Exploring Magnets Class 6 Questions and Answers

RBSE Class 6 Science Chapter 4 Exploring Magnets Question Answer

Exploring Magnets Class 6 Question Answer – InText

Page 62

Question 1.
Do magnets stick to objects made of certain materials only?
Answer:
Yes, magnets stick to objects made of iron, cobalt and nickel.

Page 64

Question 2.
Do all parts of a magnet attract magnetic materials equally?
Answer:
No, the poles of a magnet attract magnetic substances more than other parts.

Page 65

Question 3.
Can we find a magnet with a single pole?
Answer:
It is not possible to get a magnet with one pole.

RBSE Class 6th Science Chapter 4 Question Answer – Exercise

Question 1.
Fill in the blanks—
(i) Unlike poles of two magnets ……………. each other, whereas like poles ……………. each other.
(ii) The materials that are attracted towards a magnet are called ……………. .
(iii) The needle of a magnetic compass rests along the ……………. direction.
(iv) A magnet always has poles.
Answer:
(i) attract, repel (ii) magnetic (iii) North- South (iv) two

Question 2.
State whether the following statements are True (T) or False (F).
(i) A magnet can be broken into pieces to obtain a single pole.
(ii) Similar poles of a magnet repel each other.
(iii) Iron filings mostly stick in the middle of a bar magnet when it is brought near them.
(iv) A freely suspended bar magnet always aligns with the north-south direction.
Answer:
(i) False
(ii) True
(iii) False
(iv) True

Question 5.
Reshma bought three identical metal bars from the market. Out of these bars, two were magnets and one was just a piece of iron. How will she identify which two amongst the three could be magnets (without using any other material)?
Answer:
The magnets always stay in the north-south direction when hung freely. Therefore, Reshma should tie the three rods with different threads and hang them freely. The rod which is a magnet will always stay in the north-south direction. From this, Reshma can find out which two rods are magnets.

Question 6.
You are given a magnet which does not have the poles marked. How can you find its poles with the help of another magnet which has its poles marked?
Answer:
When two rods are brought near each other, the like poles repel each other, while the opposite poles attract each other. Using this property of magnets, we can find out the poles of the magnet. We bring another magnet with a poles marked on it near the pole of the magnet on which the pole is not marked and see which pole is attracted towards the pole and which pole is repelled. Based on this, we can determine the poles of the magnet.

Question 7.
A bar magnet has no markings to indicate its poles. How would you find out near which end its North pole is located without using another magnet?
Answer:
The property of a freely hanging bar magnet always stopping in the north-south direction can be used to find its positions on a bar magnet. We tie a thread to the middle of a bar magnet and hang it freely. The end of the bar magnet which always stops in the North direction will be its North pole.

Question 8.
If the earth is itself a magnet, can you guess the poles of earth’s magnet by looking at the direction of the magnetic compass?
Answer:
Our earth behaves like a huge magnet. When we turn the compass needle, its needle stops in the north-south direction. When the ends of two magnets are brought close to each other, the like poles repel each other whereas opposite poles attract each other. Hence the north pole of the magnetic compass needle points to the earth’s south magnetic pole and the south pole of the magnetic compass needle points to the earth’s north magnetic pole.

Question 9.
While a mechanic was repairing a gadget using a screw driver, the steel screws kept falling down. Suggest a way to solve the problem of the mechanic on the basis of what you have learnt in this chapter?
Answer:
Steel is a magnetic material. Hence screws made of steel may get attracted to a magnet. The mechanic should use a screwdriver whose screw end has magnetic properties. This will ensure that the screws stick to the screwdriver while tightening.

RBSE Class 6 Science Chapter 4 Important Questions

Multiple Choice Questions

1. How many poles does a magnet have?
(a) Two
(b) Three
(c) Four
(d) Five
Answer:
(a) Two

2. Which of the following is a non-magnetic substance?
(a) Iron
(b) Nickel
(c) Cobalt
(d) Silver
Answer:
(d) Silver

3. Which directions does a magnet indicate?
(a) North-East
(b) South-West
(c) North-South
(d) East-West
Answer:
(c) North-South

4. What are these substances called which are not attracted towards a magnet?
(a) Magnetic
(b) Non-magnetic
(c) Anti-magnetic
(d) None of these
Answer:
(b) Non-magnetic

5. Artificial magnets can be made from—
(a) Iron
(b) Glass
(c) Plastic
(d) Rubber
Answer:
(a) Iron

6. Compass are based on the properties of—
(a) Light
(b) Air
(c) Electricity
(d) Magnet
Answer:
(d) Magnet

7. Which instrument do sailor use to know direction?
(a) Telescope
(b) Ammeter
(c) Barometer
(d) Compass
Answer:
(d) Compass

8. Magnetic substance is—
(a) Iron
(b) Nickel
(c) Cobalt
(d) All of the above
Answer:
(d) All of the above

9. The action that takes place between the two same poles of the magnet is—
(a) Attraction
(b) Repulsion
(c) No action
(d) Sometimes attraction and sometimes repulsion
Answer:
(b) Repulsion

10. An example of a giant magnet is—
(a) Himalayas
(b) Africa continent
(c) Earth
(d) None of these
Answer:
(c) Earth

Fill in the blanks

1. Naturally occurring magnets are known as …………………….. .
Answer:
Lodestone

2. The …………………….. poles of two magnets attract each other.
Answer:
unlike

3. Non-magnetic materials are the materials that are not attracted towards a …………………….. .
Answer:
Magnet

4. While storing bar magnets, they are stored in pairs with …………………….. poles on the same side.
Answer:
unlike

5. A magnet can be made from a piece of …………………….. .
Answer:
Iron

6. The North and South poles of a magnet are marked with symbols …………………….. and …………………….. .
Answer:
N, S

True/False

1. Bar magnet has only one pole. (True/False)
Answer:
False

2. Like poles of a magnet repel each other. (True/False)
Answer:
True

3. Maximum iron filings stick at the center of a bar magnet. (True/False)
Answer:
False

4. Rubber is a magnetic material. (True/False)
Answer:
False

Match the words given in Column-I with CoIumn-II

Question 1.

Answer:

Question 2.

Answer:

Very Short Answer Type Questions

Question 1.
What did sailors use to know direction at night before the invention of magnetic compass?
Answer:
Before the invention of magnetic compass, sailors used the position of stars to know the direction at night.

Question 2.
What do you understand by lodestones?
Answer:
The magnets used by sailors in the olden days were based on naturally occurring magnets, known as lodestones which were discovered in ancient times.

Question 3.
What is an artificial magnet?
Answer:
Magnets made from pieces of iron are called artificial magnets.

Question 4.
How many poles does a magnet have? Name them.
Answer:
There are two poles in a magnet- North Pole and South Pole.

Question 5.
What are magnetic materials? Give examples.
Answer:
Those metals which arc attracted towards magnets are called magnetic metals. Examples— (1) Iron (2) Nickel (3) Cobalt.

Question 6.
A tailor was stitching a dart in a shirt. The needle slipped from his hand and fell on the floor. Can you help the tailor to find the needle?
Answer:
Yes, we can find the needle with the help of a magnet because a needle made of iron will stick to a magnet.

Question 7.
Where are the poles of a bar magnet located?
Answer:
The poles of a bar magnet are located on both ends (edges) of the magnet.

Question 8.
Write any two properties of a magnet.
Answer:

1. A magnet attracts objects made of iron, nickel and cobalt.
2. When hung freely, it directs the north-south direction.

Question 9.
In which shapes are artificial magnets made?
Answer:
Artificial magnets can be made in various shapes, such as bar magnet, U-shaped magnet, ring and spherical magnet etc.

Question 10.
Why does a freely suspended magnet always stay in the north-south direction?
Answer:
A freely suspended magnet always stays in the north-south direction because our earth itself behaves like a giant magnet.

Question 11.
Which property of a magnet is used to know directions?
Answer:
The property of a freely suspended magnet always staying in the north-south direction is used to know directions.

Question 12.
What is the meaning of ‘matsya-yantra (or machchh- yantra)?
Answer:
A device similar to the compass needle was used by Indians for navigation at sea. It consisted of a magnetised fish-shaped iron piece, kept in a vessel of oil. It was called matsya-yantra (or machchh-yantra).

Short Answer Type Questions

Question 1.
What is the difference between magnetic and non-magnetic substances?
Answer:

Question 2.
Under what conditions is attraction and repulsion found between two magnets? Explain.
Answer:
When the unlike poles of two magnets are face to face, they attract each other. On the contrary, when the like poles of both magnets are face to face, they repel each other. In this way, unlike poles show attraction and like poles show repulsion.

Question 3.
What direction does this line indicate along which the magnet rests? How can we find it out?
Answer:
If we have noticed the direction where the Sun rises or sets, we have an approximate idea of where East or West is. Hence, we can locate the direction along which the magnet rests.

Question 4.
Can we break a magnet and get a single-pitched magnet? Explain.
Answer:
It is not possible to obtain a magnet with a single pole. If a magnet is broken into smaller pieces, North and South poles always exist in pairs even in the smallest piece of the magnet. A single North pole or a South pole cannot exist.

Question 5.
Define the North pole and South pole of a magnet.
Answer:
A freely suspended magnet comes to rest along the north-south direction. The end of the magnet that points towards north direction is called the North-seeking pole or the North pole of the magnet. The other end that points towards the South direction is called the South-seeking pole or the South pole of the magnet.

Question 6.
Explain the marking of poles in a magnets.
Answer:
In some magnets, the North and South poles are marked as N and S. In some other magnets, the North pole is indicated by a white dot. Sometimes, the North pole of a magnet is painted red and South pole is painted blue.

Question 7.
Can a magnet lose its properties? Explain.
Answer:
Yes, magnets can also lose their properties. Magnets lose their properties in the following circumstances—

1. When a magnet is heated.
2. When a magnet is dropped from a height.
3. When a magnet is hit with a hammer.
4. When a magnet is kept near a mobile phone or remote.
5. In the absence of proper maintenance.

Long Answer Type Questions

Question 1.
You have been given an iron sheet. How will you make it a magnet?
Answer:
For this, first of all, place the iron sheet on a table. Now take a magnet and place one of its poles on one end of the iron sheet. After this, rub the magnet to the other end of the sheet without lifting it up. Repeat this process 30-40 times. By this, the iron sheet can be made a magnet.

Question 3.
What precautions should we take to maintain the properties of magnets?
Answer:
We should take some precautions so that the magnet does not lose its properties, such as—

1. To keep bar magnets safe, the unlike poles of their pairs should be kept close to each other.
2. These poles should be separated by a piece of wood or place two pieces of soft iron across the ends.
3. To store the U-shaped magnet, a piece of iron should be kept in contact with its poles.
4. The bar magnet should be kept far away from devices like cassette, mobile, television, music system, computer.

Question 4.
The needle of a magnetic compass is also a magnet. If a magnet is brought near it, what behaviour will it show? Explain through an activity.
Answer:
The behaviour of the needle of a magnetic compass with a magnet can be understood by the follow ing activity—

1. Take a magnetic compass and a bar magnet.
2. Place the magnetic compass over a horizontal surface and wait for its needle to come to rest.
3. Now slowly bring North pole of the bar magnet close to the North pole of the compass. Observe the compass needle carefully.
4. Now repeat the above step with the South pole of the bar magnet. Observe the compass needle.

When the North pole of a magnet is brought closer to the North pole of the compass needle, it moves away. When the South pole of the magnet is brought closer to the North pole of the compass needle, it moves closer.

Essay Type Questions

Question 1.
On what basis was the compass made? Explaining its structure, prepare a method to use it.
Answer:
The property of a freely suspended magnet to always rest along the north-south direction is used to find directions. Based on this, a small device called a magnetic compass was developed in olden days for finding directions.

Structure of a magnetic compass—A magnetic compass is usually a small circular box with a transparent cover on it. The magnet, in the shape of a needle, is mounted on a pin standing on the bottom of the box. This needle is balanced on the pin in such a manner that it can move around this point easily, that is, it can rotate freely. The end of the needle which rests in the North direction is usually painted red. Below’ the needle, there is a dial with directions marked on it.

Method to use magnetic compass—The compass is kept at the place where we wish to know the directions. After sometime, the needle comes to rest in the north-south direction. The compass box is then gently rotated until the north and south marked on the dial are aligned with the needle. Now all directions at that place are as indicated on the dial.

Question 2.
How can we make our own magnetic compass? Explain through an activity.
Answer:
We can make our own magnetic compass in the follow ing manner-

1. To make a magnetic compass collect a few materials like a cork piece, iron sewing needle, a permanent bar magnet, a glass bowl, and water.
2. Place the iron sewing needle on a wooden table. Then keep any one pole of the magnet at one end of the needle. Move the magnet over the needle along its length. When it reaches the other end of the needle, lift it up.
3. Bring the same pole of the magnet you started w ith to the same end of the sewing needle from which you began, and repeat the previous step. Repeat this process at least 30 to 40 times.
4. Bring some iron filings or steel pins near the needle. If the pins or iron filings get attracted to the needle, then that means that the needle has become a magnet.
5. Pass this needle through the cork horizontally. Float the cork in a glass bowl filled with water, such that the needle always remains above the level of water.
6. When the needle comes to rest, your magnetic compass is ready for use.

Question 3.
What change occurs in the magnetic effect when a non-magnetic substance is placed between two magnets? Explain by an experiment.
OR
Prove by an activity/experiment that magnetic effect can pass through non¬magnetic substances.
Answer:
The change in the magnetic effect of two magnets when a non-magnetic material comes between them can be understood by the following experiment—

1. Take a magnetic compass and a bar magnet.
2. Place the magnetic compass over a horizontal surface and wait for its needle to come to rest.
3. Now slowly bring North pole of the bar magnet close to the North pole of the compass needle. Observe the compass needle carefully.
4. We see that the compass needle gets deflected.
5. Now without disturbing the bar magnet and magnetic compass, place a piece of wood between them, perpendicularly. Observe the compass needle carefully.
6. Repeat the process by replacing the piece of wood by a cardboard sheet, thin plastic sheet, and a thin glass sheet.

We observe that there is no appreciable change in the deflection of the needle when a sheet of any of the above material is placed between the magnet and the compass needle. So, we can conclude that the magnetic effect can act through non-magnetic materials.

RBSE Class 6 Science Chapter 4 Notes

Class 6 Science Chapter 4 Notes RBSE – Exploring Magnets Class 6 Notes

1. Since ancient times the travellers and sailors used a device, known as a magnetic compass, for finding directions.
2. Magnets are found naturally and magnets can also be made from pieces of iron.
3. Magnets can be of different sizes.
4. All magnets have two poles—the North pole and the South pole.
5. The poles of a magnet always exist in pairs. A single North pole or a single South pole cannot exist.
6. The materials which are attracted towards a magnet are called magnetic materials whereas the materials which are not attracted towards a magnet are called non-magnetic materials.
7. A freely suspended magnet rests along the north-south direction.
8. Magnetic compass has a magnet in the shape of a needle which can rotate freely. The needle of a magnetic compass indicates the north-south direction.
9. When two magnets are brought close to each other, like poles (North-North, South-South) repel each other while unlike poles (North-South) attract each other.
10. The magnetic effect can act through non-magnetic materials.