Interaction between Magnets

Q.

Which is non-magnetic material?

Q.

Question 4

North pole of a magnet can be identified by

(a) Another magnet having its poles marked as North pole and South pole.

(b) Another magnet no matter whether the poles are marked or not.

(c) Using an iron bar.

(d) Using iron filings.

Q.

Magnetite is an ore of __________ .

Q.

Two magnets are placed close to each other as shown below. Which set will attract each other?

1. 

2. 

3. 

4. 

Q. "Poles always exist in pairs". Comment on this statement.

Q.

Brass is a magnetic substance.

1. True
2. False

Q.

Statements given below are incorrect. Write the correct statements.

Aluminium is a magnetic substance.

Q.

Suppose you have two magnets whose ends are marked as South Pole and North Pole. You have to keep two magnets such that one magnet is upon other magnet and also their North Poles are on same side. How will these magnets behave?

1. They will move away from each other

2. They will not react

3. They will try to come closer to each other

4. Can't say

Q.

When the south pole of a magnet is brought near the north pole of a freely suspended magnetic needle, they ___ each other.

Q. How is a cow magnet used to prevent Hardware disease in cattle? (Hardware disease is usually caused by the ingestion of a sharp metallic object)

1. It kills all the magnetic material inside the cow.
2. It is a magnet which collects all the magnetic material inside the cow.
3. It is an antibiotic.
4. None of the above

Q.

Gold is a ferromagnetic substance.

1. True
2. False

Q.

Magnetic power of a magnet increases on heating it.

1. True
2. False

Q.

When a magnet tied to mass-less string is freely suspended in a horizontal direction, it always come to rest in the ________ direction.

Q.

When North pole of a bar magnet is brought near the north pole of a freely suspended magnetic needle, it will ___

Q.

Matt has a magnet which is pointing in the North-South direction. He brings a large magnet which is not pointing in the North-South direction close to it. Can you tell what will happen to the first magnet?

1. It will remain unchanged

2. It will change its direction so that its poles become parallel to the large magnet

3. It will change its direction to South-North

4. Can't say

Q.

Which of the following is NOT a property of magnet?

1. A magnet points in North-South direction when suspended freely.

2. Unlike poles of magnets attract each other.

3. Like poles of magnets repel each other.

4. A magnet points in East-West direction when suspended freely.

Q.

A toy car has a bar magnet laid hidden inside its body along its length. Using another magnet how will you find out which pole of the magnet is facing the front of the car?

Q.

Like poles of magnets repel each other.

1. Attract

2. Repel

Q.

Repulsion is a true test of magnetism.

1. None

2. Rotation

Q.

Rubber is an example of a non-magnetic material.

1. True
2. False

Q.

The surest test of magnetism is:

1. attraction

2. repulsion

3. both a and b

4. none of these

Q.

Which of the following is/are not correct about a magnet?

1. A magnet has two poles.

2. Like poles attract each other.

3. A magnet attracts magnetic material.

4. Unlike poles repel each other.

Q.

Magnets can repel magnetic materials.

1. Attracts

2. Repels

Q.

So, If I have a permanent magnet can I see that each tiny kingdom(which is called a domain) is aligned in the same direction?

1. True

2. False

Q.

___is the surest test for magnetism.

Q.

When a magnet is kept on a table and a compass is taken close to it, it points in a certain direction at every point near the magnet. When the points are joined, we obtain certain lines. Choose the correct statement(s) regarding the lines
1. The closer they are, the stronger the magnet.
2. They are imaginary lines which have a particular direction.

1. Only 1
2. Only 2
3. Both 1 and 2
4. Neither 1 nor 2

Q.

Which of the following statement is TRUE?

1. A cylindrical magnet has only one pole.

2. Artificial magnets were discovered in Greece.

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

4. Similar poles of a magnet repel each other.

Q.

Repulsion is the surest test of magnetism because

1. attraction occurs between unlike poles

2. attraction occurs between a magnet and magnetic materials.

3. Both of the above are true.

Q.

When a South pole of a magnet in brought near the North pole of a freely suspended magnetic needle, it will ___.

Q. Do magnetic poles always exist in pairs?