Induced Magnetism

Q.

What are hard magnetic materials?

Q.

Give some examples of induced magnetism.

Q.

An iron metal bar can be converted into a permanent magnet.

1. True

2. False

Q. If we attach one end of an iron nail to the south pole of a bar magnet, the other free end of the nail would behave as.

1. north pole
2. south pole
3. non-magnet

Q.

A person observes that a magnet attracts the iron bar when kept next to it. What inferences could be drawn from this observation?

1. Magnets have magnetic field around them.
2. Iron is a magnetic material.
3. Iron nails are light weighted.
4. Magnets can induce magnetism in other magnetic materials.

Q.

Give one word answer

The iron pieces that are used for storing magnets.

Q. What precautions must be taken into account while making your own magnet?

Q.

What are magnetic keepers? Name its material.

Q.

Which of the following is the correct way of storing magnets.

Q. When a permanent magnet is brought near a magnetic material for a short time, the material acquires ________.

1. permanent magnetism
2. induced magnetism
3. electromagnetism
4. stronger magnetism

Q.

What are magnetic keepers? Which material are they made up of?

Q.

For storing the magnets, plastic strips are used as the magnetic keepers.

1. True
2. False

Q. The purpose of a magnet keeper is to____.

1. enhance the properties of a magnet
2. use up the magnetic energy
3. retain the properties of a magnet
4. keep magnets from getting physically damaged

Q. Which of the following steps are involved in magnetising an iron strip with the help of a bar magnet?

1. Rubbing two iron pieces together.
2. Only touching an iron piece with a magnet.
3. Rubbing the whole of a bar magnet on the iron piece.
4. Rubbing one end of a bar magnet repeatedly on the iron piece.

Q.

What is the function of magnetic keeper ?

Q. How can you transform a magnetic material to a magnet with the help of another magnet?

1. Sticking the material to the magnet
2. Rubbing the material with the magnet in one direction
3. Heating the material
4. Magnets can only be naturally formed

Q.

State the use of magnet keepers?

Q. Why permanent magnets are kept with soft iron pieces at ends as keepers ?

1. To magnetise the soft iron pieces
2. To increase the strength of the magnets
3. To avoid self demagnetisation
4. For physical safety of the magnets

Q.

What is induced magnetism?

Q. The purpose of a magnet keeper is to the property of the magnet.

1. enhance
2. retain
3. diminish

Q.

What are magnetic keepers? How magnetic keepers are used to store magnet.

Q.

A single keeper can protect a horseshoe magnet but not a bar magnet.

1. True
2. False

Q.

What is a natural magnet?

Q. While storing bar magnets, they should be separated by ______.

1. a piece of wood
2. a piece of plastic
3. a piece of rubber
4. a piece of bar magnet

Q. In the process of magentising an iron piece, where will the north pole be formed?

1. 
2. 
3. 

Q. A piece of iron is magnetized by sliding a bar magnet over it, as shown in the figure.

Which part of the iron piece will become the north pole?

1. X
2. W
3. Z
4. Y

Q. In the process of magentising an iron piece, where will the north pole be formed?

1. 
2. 
3. 

Q. In the process of magentising an iron piece, where will the north pole be formed?

1. 
2. 
3. 

Q.

Sailors can find the directions by freely suspending a piece of ______.

1. silver

2. lodestone

3. copper

4. wood

Q. Which of the following steps are involved in magnetising an iron strip with the help of a bar magnet?

1. Rubbing two iron pieces together.
2. Rubbing the whole of a bar magnet on the iron piece.
3. Only touching an iron piece with a magnet.
4. Rubbing one end of a bar magnet repeatedly on the iron piece.