Magnetic and Non Magnetic Materials

Q. The materials which are attracted by a magnet are called

1. macroparticle
2. polar substances
3. magnetic materials
4. non-magnetic materials

Q.

What is a magnetic substance?

Q.

How will you test whether a given rod is made of iron or copper ?

Q.

If an iron bar is placed near a bar magnet then opposite pole appear on an iron bar at near end to bar magnet and similar pole appears on the iron bar at the farther end to the bar magnet.

1. True

2. False

Q.

Which of the following gets attracted towards a magnet?

1. Paper

2. Silver spoon

3. Comb

4. Common pins

Q.

Magnets are not used in:

1. motor

2. telephone

3. water filter

4. geyser

Q.

Which of the following is a non-magnetic substance?

1. iron

2. nickel

3. cobalt

4. copper

Q.

Why do magnets stick to metals?

Q.

What are the different types of magnetic substances.Give a short note on each of the types.

Q.

Statements given below are incorrect.

Write the correct statements.

Copper metal is used for making coins and hence is a magnetic substance.

Q.

Induced magnetism is purely temporary.

1. True

2. False

Q.

Among the following materials mentioned below which will not be attracted by the magnet?

1. Iron

2. Nickle

3. Wood

4. Cobalt

Q.

The materials that are easily attracted by a magnet are called ___________ .

Q. Which of the following objects won't show any reaction to the presence of a magnet in their vicinity?

1. Wooden vase
2. Silver spoon
3. Plastic comb
4. Paper pins

Q.

Which of the following cannot be used to make a magnet?

1. Cobalt

2. Iron

3. Ebonite

4. Steel

Q. The SI unit of magnetic permeability is:

1. ${Am}^{-1}$
2. ${Am}^{-2}$
3. ${Hm}^{-2}$
4. ${Hm}^{-1}$

Q. Materials like are also magnetic in nature in addition to iron.

1. silicon, aluminium
2. cobalt, nickel
3. chromium, gold

Q.

Magnetite is a/an______.

1. Artificial magnet

2. Electromagnet

3. Not a magnet

4. Natural magnet

Q.

Find the odd one out. Give reason for your answer.

1. Cobalt

2. Aluminium

3. Rubber

4. Stone