Selina solutions concise physics class 6 icse Solutions for Chapter 6 magnetism

Q1) Write true or false for each statement :

1. Artificial magnets are weaker than the natural magnets

2. Poles of a magnet cannot be separated

3. A magnet can attract only a magnetic substance

4. A magnet has no effect when it is heated to a high temperature

5. Permanent magnets get easily demagnetised

6. Magnetic poles occur in pairs

7. Single touch method is better than the electrical method for making a magnet

8. Magnetic keeper is a wooden piece

9. Copper cannot be magnetised.

Q2) Fill in the blanks

1. Temporary magnets are usually made up of _____.
2. Rough handling destroys the _____ properties of a magnet
3. Like poles ____ each other
4. A freely suspended magnet points in the ______ direction
5. In a magnet, ____ have the maximum attractive property
6. A magnet has ____ poles.

Q3) Match the following

Q4) Select the correct answer

(a) If we suspend a magnet freely, it will settle in

1. East-west direction

2. North-south direction

3. Northeast direction

4. East south direction

(b) Making a magnetic substance a magnet by bringing it closer to another magnet without touching it, is

1. Magnetic induction method

2. Single touch method

3. Double touch method

4. Electrical method

(c) An example of a natural magnet is

1. Iron

2. Steel

3. Lodestone

4. None of the above

(d) The artificial magnet used to detect direction in the laboratory is

1. U-shaped magnet

2. Horse shoe magnet

3. Electromagnet

4. Magnetic compass

Q1) What is a magnet?

Q2) What are magnetic and non- magnetic substances? Give two examples of each.

Q3) What are natural and artificial magnets?

Q4) How is an artificial magnet prepared from natural magnet?

Q5) State two ways of magnetising an iron piece.

Q6) How can magnetic properties of a magnet be destroyed?

Q7) Why does a freely suspended magnet always rest in north-south direction?

Q8) Draw diagrams of the artificial magnets of different shapes.

Q9) Why are the artificial magnets preferred over the natural magnets?

Q10) Describe an experiment to show that the maximum attractive property is at the poles of a magnet.

Q11) State four important properties of a bar magnet.

Q12) Explain the attractive property of a magnet with the help of an experiment.

Q13) Describe the method by which an iron bar can be made a magnet.

Q14) How are the magnets kept safely? What is the role of keepers in storing the magnets?

Q15) Define the temp magnetic field of a magnet. How will you recognise it experimentally?

Q16) How will you make iron bar electromagnet? Draw a diagram showing the polarities of the electromagnet.

Q17) State two ways of increasing the strength of an electromagnet.

Q18) Suppose you are given a long bar magnet and you are asked to break it into four small magnets. Draw diagrams showing the polarities of each broken part.

Q19) State three important uses of a magnet.

Q20) What is magnetic induction? Explain with the help of a diagram.

Q21) In which direction does a suspended bar magnet come to rest? Give reason.

Q22) State three differences between the temporary and permanent magnets.

Q23) State three ways of demagnetising a magnet.

Q24) Suggest one wat to recognise the magnetic field of the earth.

Q25) Name the material of the core of an electromagnet for

1. temporary magnet

2. permanent magnet

Q26) You are given an iron nail, a touch cell and a long piece of insulated copper wire. With the help of a labelled neat diagram, describe in steps how you will make the nail, an electromagnet.

Q27) Describe an experiment to illustrate that like poles repel while the, unlike poles, attract.

Q28) What are magnetic keepers? Name its material.

Q29) How are the north and south poles of a magnet located? Explain.