Formation of Natural Magnets

Q.

Which of these is a naturally occurring magnet?

1. Nickel

2. Cobalt

3. Ebonite

4. Magnetite

Q.

What is a natural magnet known as?

1. Lodestone

2. Magnetoes

3. Burocks

4. Dumagnets

Q.

Which of the following magnetic ore, was once used as a primitive compass?

1. magnetite

2. None of these

3. Lodestone

4. Hematite

Q.

Question 5

Write any two properties of a magnet.

Q.

A magnet has following properties

1. Attractive property

2. Repulsive property

3. Directive property

4. All of the above

Q.

___ is the only natural magnet.

Q.

The natural magnet is an ore of___

Q.

We can separate North and South pole from a magnet.

1. None of these

2. Both A and B

Q.

____is the only natural magnet.

1. Nickel

2. Iron

3. Cobalt

4. Magnetite

Q.

What is meant by polarity of a magnet?

Q.

Like poles of magnets___each other.

Q.

When ___ strikes at a piece of iron ore, a permanent magnet is formed.

Q.

which of the following shows tht the earth behaves as a magnet?

a) repulsion between like poles

b) attraction between unlike poles

c) exixtence of null points in the magnetic field of a bar magnet.

d) non-existence of monopoles.

Give reasons of your answer.

Q.

Which of the following is a non magnetic material?

1. Sulphur

2. Iron

3. Cobalt

4. Nickel

Q.

Which of the following is a natural magnet?

1. Cobalt

2. Iron

3. Magnetite

4. Nickel

Q.

Which of the following shows magnetic behaviour?

1. Metal

2. Paper

3. Plastic

4. Wood

Q.

Which of the following has magnetic properties?

1. Lodestone

2. Calcite

3. Bronzite

4. Amber

Q.

Substances that have the property of attracting iron are known as _________.

1. magnets

2. conductor

3. electrons

4. insulator

Q. Magnetite is a/an ______.

1. natural magnet
2. artificial magnet
3. electromagnet
4. non-magnetic substance