NCERT Question 2 - Chapter 13 Class 6 - Fun with Magnets

State whether the following statements are true or false:

1. A cylindrical magnet has only one pole.
2. Artificial magnets were discovered in Greece.
3. Similar poles of a magnet repel each other.
4. Maximum iron filings stick in the middle of a bar magnet when it is brought near them.
5. Bar magnets always point towards North-South direction.
6. A compass can be used to find East-West direction at any place.
7. Rubber is a magnetic material.

Answer:  

(i)  

Magnets always have two poles ,ie, the north pole and the south pole. A cylindrical magnet also has two poles.

So, the given statement is False.

(ii)  

Artificial magnets were not discovered in Greece . Only natural magnets were discovered in Greece.

So, the given statement is False.

(iii)

Like (similar) poles of magnets repel each other , while unlike(different) poles of magnets attract each other.

So, the given statement is True.

(iv)  

The amount of iron filings that stick to a bar magnet depends on the strength of the magnet . The strength of a bar magnet is maximum at its two poles and minimum in the middle. Hence, maximum iron filings will stick at the two ends of the magnet and minimum in the middle.

So, the given statement is False.

(v)

A freely suspended magnet always points towards the North−South direction.

So, the given statement is True.

(vi)  

A magnetic compass always points towards the North−South direction.

If the North−South direction is known , then the East−West direction can also be determined.

So, the given statement is True.

(vii) Rubber is not attracted by a magnet . Hence, it is a non-magnetic material.

So, the given statement is False.