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NCERT Solutions for Class 6 Science Chapter 13 Fun with Magnets

## NCERT Solutions for Class 6 Science Chapter 13 Exercise

Q1 (i). Fill in the blanks in the following

Artificial magnets are made in different shapes such as __________, __________ and ____________.

Answer: (i) Artificial magnets are made in different shapes such as bar magnet , horseshoe magnet , cylindrical magnet .

Q1 (ii) . Fill in the blanks in the following

The Materials which are attracted towards a magnet are called________.

Answer: (ii) The Materials which are attracted towards a magnet are called magnetic materials.

Q1 (iii) . Fill in the blanks in the following

Paper is not a ______ material.

Answer: (iii) Paper is not a magnetic material.

Q1 (iv) . Fill in the blanks in the following

In olden days, sailors used to find direction by suspending a piece of ___________.

Answer: (iv) In olden days, sailors used to find direction by suspending a piece of magnet.

Q1 (v) . Fill in the blanks in the following

A magnet always has __________ poles.

Answer: A magnet always has two poles.

Q2 (i). State whether the following statements are true or false:

A cylindrical magnet has only one pole.

Answer: (i) False , because a magnet always has two poles.

Q2 (ii). State whether the following statements are true or false:

Artificial magnets were discovered in Greece.

Answer : (ii) False , Natural magnets were discovered in Greece.

Q2 (iii) . State whether the following statements are true or false:

Similar poles of a magnet repel each other.

Answer: True , similar poles of a magnet repel each other.

Q2 (iv) . State whether the following statements are true or false:

Maximum iron filings stick in the middle of a bar magnet when it is brought near them.

Answer: (iv) False , Maximum iron filings are attracted more towards the region close to two ends of a bar magnet.

Q2 (v) . State whether the following statements are true or false:

Bar magnets always point towards North-South direction.

Answer: (v) True , Bar magnet always points towards North-South direction.

Q2 (vi) State whether the following statements are true or false:

A compass can be used to find East-West direction at any place.

Answer: (vi) True , a compass can find East- West direction also.

Q2 (vii) . State whether the following statements are true or false:

Rubber is a magnetic material.

Answer: (vii) False , It is an insulator. Rubber is not attracted or repelled by a magnet. Hence it is a non-magnetic material.

Q3. 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 is used to make the blade of the sharpener and as iron is magnetic material it gets attracted by both the poles of a magnet.

Q4. 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

 Column I Column II N-N Repulsion N - S Attraction S-N Attraction S - S Repulsion

Q5. Write any two properties of a magnet.

Answer: Two properties of a magnet are:

(i) It attracts objects like iron, nickel, and cobalt.

(ii) When freely suspended a bar magnet get oriented in the north-south direction.

Q6 . Where are poles of a bar magnet located?

Answer: The north and south poles are located on the two ends of a bar magnet.

Q7 . A bar magnet has no markings to indicate its poles. How would you find out near which end is its north pole located?

Answer: A freely suspended bar magnet always comes to rest in a particular direction, which is the North-South direction. So if there is no marking then the end of a magnet pointing to the north is the north pole of the magnet.

Q8 . You are given an iron strip. How will you make it into a magnet?

Answer: We will make iron strip into a magnet by the following steps:

(i) Place the iron strip on the table. Now take a bar magnet and place one of its poles near one edge of the bar of iron.

(ii) 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 (the same pole you started with) to the same point of the iron bar from which you began.

(iii) Move the magnet again along the iron bar in the same direction as you did before. Repeat this process about 30-40 times.

(iv) Bring a pin or some iron filings near the iron bar to check whether it has become a magnet.

you will find that the iron strip is now converted into a magnet.

Q9 . How is a compass used to find directions?

Answer: We can find the directions from the compass by the following steps:

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.

Q10 . 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.

 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 non-magnetic material

 Column I Matched Column II Boat gets attracted towards the magnet Boat is made of magnetic material. Boat is not affected by the magnet Boat is made up 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 north pole towards its head Boat floats without changing its direction Boat has a small magnet fixed along its length

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