NCERT Solutions for Class 6 Science Chapter 13 : Fun with Magnets

### A:

A compass has a magnetic needle which can move around a pivot. As a magnet always stays in north-south direction hence, this property of magnet is used to find the directions with the help of a compass.

### A:

To convert an iron strip into a magnet, place the iron strip on the table. Now, rub a permanent magnet on the strip. While doing this, the movement of your hand should always be in the same direction.  After doing this 40–50 times, the iron piece would attain magnetic properties.

### A:

There are two poles of a magnet namely North pole and South pole. They are located at the two ends of the magnet.

### A:

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

### A:

The poles of a bar magnet with no marking can be identified by suspending the bar magnet freely with the help of a light thread. A freely suspended bar magnet always comes to rest in the North−South direction.The north facing end of the magnet indicates its north pole while the south facing end indicates its south pole.

### A:

Two properties of a magnet are:

i. Unlike poles of two magnets attract each other.

ii. Like poles of two magnets repel each other.

### A:

In a pencil sharpener, the blade is made of iron and iron is a magnetic material. Magnets have tendency to attract the objects made of iron. Hence, a pencil sharpener gets attracted towards both the poles of a magnet.

### A:

(i) A cylindrical magnet has only one pole. (False)

Explanation: A magnet cannot exist with a single pole. A magnet always exists with two poles. Hence, a cylindrical magnet has also two poles.

(ii) Artificial magnets were discovered in Greece. (False)

(iii) Similar poles of a magnet repel each other. (True)

Explanation: Like poles of magnets repel each other, while unlike poles of magnets attract each other.

(iv) Maximum iron filings stick in the middle of a bar magnet when it is bought near them. (False)

Explanation: The magnetic strength of a bar magnet is maximum at its two poles and minimum at middle. Hence, maximum iron filings will stick at two ends of the magnet and minimum in the middle.

(v) Bar magnets always point towards the North−South direction. (True)

(vi) A compass can be used to find the East−West direction at any place. (True)

Explanation: We know that a magnetic compass always points towards the North−South direction. If the North−South direction is known, then the East−West direction can be found.

(vii) Rubber is a magnetic material. (False)

Explanation: Rubber is a non-magnetic material as it is not attracted by a magnet.

### A:

 Column I Column II Boat gets attracted towards the magnet Boat is made of magnetic material Boat is not affected by the magnet Boat is made of a non-magnetic material Boat moves towards the magnet when the north pole of the magnet is brought near its head Boat is fitted with a magnet with the south pole towards its head Boat moves away from the magnet when the north pole is brought near its head Boat is fitted with a magnet with the north pole towards its head Boat floats without changing its direction Boat has a small magnet fixed along its length

### A:

(i) Artificial magnets are made in different shapes such as bar magnets, horse-shoe magnets, and cylindrical magnets.

(ii) Materials which are attracted towards magnets are called magnetic materials.

(iii) Paper is not a magnetic material.

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

Explanation: The sailors used to find direction by suspending a piece of bar magnet because a freely suspended magnet always comes to rest in the North-South direction.

(v) A magnet always has two poles.

Explanation: A magnet consists two poles namely the South pole (S) and the North pole (N).

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