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Our team of subject expert teachers has prepared and reviewed the NCERT Solutions for Class 6 Science Chapter 13 Fun with Magnets are given here will help you to prepare well and score good numbers in exams.
Fun with Magnets NCERT Solutions for Class 6 Science Chapter 13
Class 6 Science Chapter 13 Fun with Magnets Exercise Questions and Answers
Question 1.
Your mother was repairing your shirt. The needle has slipped from her hand into a box containing buttons, threads, etc. How will you search for the needle?
Answer:
We will search for the needle with the help of a magnet. The magnet attracts the needle from the box containing buttons, threads, etc.
Question 2.
If you are given two identical bars which look as if they might be made of iron. One of them is a magnet, while the other is a simple iron bar. How will you find out, which is which?
Answer:
We bring iron pins near both bars. The bar which attracts iron pins is the magnet. The bar which does not attract iron pins is a simple iron bar.
Question 3.
What will happen if a magnet is brought near a compass?
Answer:
The north pole of the compass attracts towards the south pole of a magnet.
Question 4.
You are given two identical-looking bars of some material. You are told that one of them is a magnet, while the other is not. Using a magnet how will you find out which is which?
Answer:
We will bring the magnet near both bars. The bar whose both ends are attracted to one pole of the magnet is not a magnet.
The bar whose one end is attracted to one pole of the magnet and the other end repels the magnet if brought near the same pole than the bar is a magnet.
Question 5.
Fill in the blanks in the following:
- Artificial magnets are made in different shapes such as …………………………, ………………………… and
- The materials which are attracted towards a magnet are called ………………………….
- Paper is not a ………………………… material.
- In the olden days, sailors used to find direction by suspending a piece of ………………………….
- A magnet always has ………………………… poles.
Answer:
- bar-shaped, U-shaped, circular
- magnetic materials
- magnetic
- lode stone
- two
Question 6.
State whether the following statements are true or false:
(a) A cylindrical magnet has only one pole.
Answer:
False
(b) Artificial magnets were discovered in Greece.
Answer:
False
(c) Similar poles of a magnet repel each other.
Answer:
True
(d) Maximum iron filings stick in the middle of a bar magnet when it is brought near them.
Answer:
False
(e) Bar magnets always point towards the North-South direction.
Answer:
True
(f) A compass can be used to find East-West direction at any place.
Answer:
False
(g) Rubber is a magnetic material.
Answer:
False
Question 7.
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:
A pencil sharpener contains some iron parts.
Question 8.
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 | Repulsion |
N- __________ | Attraction |
S-N | __________ |
_________ -S | Repulsion |
Answer:
Column I | Column II |
N-N | Repulsion |
N-S | Attraction |
S-N | Attraction |
S-S | Repulsion |
Question 9.
Write any two properties of a magnet.
Answer:
- The magnet attracts magnetic substances.
- Magnet when freely suspended always points in north-south directions.
Question 10.
Where are the poles of a bar magnet located?
Answer:
Poles of a bar magnet are located at the ends of a magnet.
Question 11.
A bar magnet has no markings to indicate its poles. How would you find out near which end is its north pole located?
Answer:
When a bar magnet is suspended freely, it always rests in north-south directions. The end pointing towards the north is called the north-seeking end or the north-pole and the end pointing towards the south is called the south seeking end or the south-pole of the magnet. Usually, north (N) and south (S) poles are marked on the magnets (Fig. 13.4).
Question 12.
You are given an iron strip. How will you make it a magnet?
Answer:
We place the iron strip on a table we stroke it with one pole of a bar magnet in one direction. When we reach the other end of the iron strip we lift the magnet and bring the same pole back to the starting end of the iron piece. We stroke again in the same direction. We repeat this process about 30-40 times. The iron strip becomes a magnet.
Question 13.
How is a compass used to find directions?
Answer:
The magnetic compass is a small magnetic needle enclosed in a glass case. The magnetic needle is fixed at the centre so that it can move freely. When kept on a table top, the needle of the compass will come to rest pointing in the north-south directions. It is thus used in the laboratory to mark directions.
Question 14.
A magnet was brought from different directions towards a toy boat that has been floating in water in a tub. Effect observed in each case is stated in Column I. Possible reasons for the observed effects are mentioned in Column II. Match the statements give in Column I with those in Column II.
Column I | Column II |
Boat gets attracted to the magnet. | Boat is fitted with a magnet with a north pole towards its head. |
Boat is not affected by the magnet. | Boat is fitted with a magnet with a south pole towards its head. |
Boat moves towards the magnet if the 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 to the magnet. | Boat is made of magnetic material. |
Boat is not affected by the magnet. | Boat is made up of non-magnetic material. |
Boat moves towards the magnet if the north pole of the magnet is brought near its head. | Boat is fitted with a magnet with a 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. |
Class 6 Science Chapter 13 Fun with Magnets InText Questions and Answers
Activity 1
Take a plastic or a paper cup. Fix it on a stand with the help of a clamp as shown in the figure below. Place a magnet inside the cup and cover it with paper so that the magnet is not visible. Attach a thread to a clip made of steel. Fix the other end of the thread at the base of the stand. Bring the clip near the base of the cup. What happens?
Answer:
The clip is raised in the air without support, like a kite.
Activity 2
Collect various objects of day-to-day use from your surroundings. Take a magnet, touch these objects with it and observe which objects stick to the magnet Prepare a table in your notebook as shown in the following table and record your observations.
S.No. | Name of the object | Material which the object is made of (cloth/plastic/alu- minium//wood/glass iron/any other) | Attracted by Magnets stick/magnet |
1. | Iron ball | Iron | Yes |
2. | Scale | Plastic | No |
3. | Shoe | Leather | No |
4. |
Answer:
S.No. | Name of the object | Material which the object is made of (Cloth/plastic/alu- minium//wood/glass iron/any other) | Attracted by Magnets stick/magnet |
1. | Iron ball | Iron | Yes |
2. | Scale | Plastic | No |
3. | Table | Wood | No |
4. | Rubber | Rubber | No |
5. | Glass | Glass | No |
6. | Coin | Iron, nickel | Yes |
7. | Statue | Aluminium | No |
8. | Pins | Iron | Yes |
9. | Shoe | Leather | No |
Activity 3
Spread iron filings on a sheet of paper. Place a bar magnet on it. Answer the questions :
Question 1.
What do you observe?
Answer:
Iron filings stick to the magnet.
Question 2.
Do the iron filings cling all over the magnet, uniformly?
Answer:
No.
Question 3.
Do you observe more iron filings clinging to the magnet near its ends or near its middle?
Answer:
More iron filings cling near the ends of a magnet.
Question 4.
Draw a figure of the way iron filings cling to various portions of the magnet.
Answer:
Activity 4
Take a magnet Put a mark on one end of it for identification. Now suspend! it from a wooden stand with the help of a thread so that it can freely rotate in all directions. Allow it to come to rest. Mark the direction on the ground in which the magnet comes to rest Now change the direction of the magnet by rotating it or by rotating the stand. Rotate the magnet clock-wise, anti-clockwise, put it upside down, and observe the direction in which it rests.
Answer:
We observe that the magnet always comes to rest in one direction.
Activity 5
We take two small toy cars. Fit a magnet each on the top of the cars such that the north poles of the magnets point towards the front of the cars and the south poles point towards the back. We keep one car behind the other one. Answer the questions that follow. What do we observe?
Ans. We observe that cars run towards each other and cling to one another.
Question 1.
Do the cars remains at their places?
Answer:
No.
Question 2.
Do the cars run away from each other?
Answer:
No.
Question 3.
Do we have to apply force to bring the cars near each other?
Answer:
No.
Question 4.
Do the cars run towards each other and cling to one another?
Answer:
Yes.
Question 5.
What does the above activity show?
Answer:
The above activity shows that similar poles repel each other.
Activity 6
We try to put above cars front-facing i.e. the north poles of the magnets of both the cars in front of each other.
Question 1.
What do you observe now?
Answer:
They run away from each other.
Question 2.
Try to bring the cars together. Do you need to apply force to bring them near each other
Answer:
Yes.
Question 3.
Forcibly, king the two cars near each other and leave. What do you observe?
Answer:
The cars again run away from each other.
Question 4.
Try to bring back the cars i.e. south poles of the magnets near each other. What do you observe? Do the cars attract repel each other?
Answer:
The cars repel each other.
Question 5.
What does the above activity show?
Answer:
The above activity shows that similar poles repel each other.