# NCERT Exemplar Class 6 Science Chapter 13 Fun with Magnets

In this chapter, we provide NCERT Exemplar Problems Solutions for Class 6 Science Chapter 13 Fun with Magnets for English medium students, Which will very helpful for every student in their exams. Students can download the latest NCERT Exemplar Problems Solutions for Class 6 Science Chapter 13 Fun with Magnets pdf, free NCERT Exemplar Problems Solutions for Class 6 Science Chapter 13 Fun with Magnets book pdf download. Now you will get step by step solution to each question.

## NCERT Exemplar Class 6 Science Solutions Chapter 13 Fun with Magnets

Multiple Choice Questions

Question 1:
Observe the pictures A and B given in figure carefully.

Which of the following statements is correct for the above given pictures?
(a) In A, cars 1 and 2 will come closer and in B, cars 3 and 4 will come closer.
(b) In A, cars 1 and 2 will move away from each other and in B, cars 3 and 4 will move away.
(c) In A, cars 1 and 2 will move away and in B, 3 and 4 will come closer to each other.
(d) In A, cars 1 and 2 will come closer to each other and in B, 3 and 4 will move away from each other.
Solution:
(d) In A, cars 1 and 2 will come closer to each other because North and South poles (i.e. opposite poles) attract each other while in S, cars 3 and 4 will move away from each other because South poles (i.e. similar poles) repel each others

Question 2:
The arrangement to store two magnets is shown by figures (a), (b), (c) and (d) in figure. Which one of them is the correct arrangement?

Solution:
(b) The correct arrangement is shown in option (b). To store the two magnets safely, they should be kept in pairs with their unlike poles on the same side. They must be separated by a piece of wood, while two metal plates should be placed across their ends.

Question 3:
Three magnets A, B and C were dipped one by one in a heap of iron filings.
Figure shows the amount of the iron filings sticking to them.

The strength of these magnets will be
(a) A > B > C (b)A < B < C
(c) A = B = C (d )A < B > C
Solution:
(a) As we can see from the diagram that amount of iron filings in A is greater than B and C and in 8, it is greater than C. So, the strength of magnets will be according to the amount of iron filings sticking to them only.

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.
Solution:
(a): That pole of the magnet which is repelled by the north pole of the given magnet will be considered as north pole of the magnet.

Question 5.
A bar magnet is immersed in a heap of iron filings and pulled out. The amount of iron filing clinging to the
(a) North pole is almost equal to the south pole.
(b) North pole is much more than the south pole.
(c) North pole is much less than the south pole.
(d) Magnet will be same all along its length.
Solution:
(a): Magnetic strengths of north pole and south pole of a magnet is same.

Very Short Answer Type Questions

Question 6.
Fill in the blanks.
(i) When a bar magnet is broken; each of the broken part will have _________ pole/poles.
(ii) In a bar magnet, magnetic attraction is _____ near its ends.
Solution:
(i) two
(ii) more

Question 7.
Paheli and her friends were decorating the class bulletin board. She dropped the box of stainless steel pins by mistake. She tried to collect the pins using a magnet. She could not succeed. What could be the reason for this?
Solution:
The pins are made of stainless steel which is a non-magnetic material.

Question 8.
How will you test that ‘tea dust’ is not adulterated with iron powder?
Solution:
By using a magnet we can test that tea dust’ is not adulterated with iron powder. If it has iron powder it will stick to the magnet.

Question 9:
Boojho dipped a bar magnet in a heap of iron filings and pulled it out. He found that iron filings got stuck to the magnet as shown in figure.

(a) Which regions of the magnet have more iron filings sticking to it?
(b) What are these regions called?
Solution:
(a) The two ends of the magnet have more iron filings sticking to it because magnetic strength is maximum near the ends of the magnet.
(b) These ends are called poles of the magnet (i.e. North and South poles of magnet).

Short Answer Type Questions

Question 10:
Four identical iron bars were dipped in a heap of iron filings one by one. Figure shows the amount of iron filings sticking to each of them.

(a) Which of the iron bar is likely to be the strongest magnet?
(b) Which of the iron bar is not a magnet? Justify your answer.
Solution:
(a) Iron bar (i) seems to be the strongest magnet because the maximum amount of iron
filings are sticking to it, i.e. maximum iron filings have been attracted by it.
(b) Iron bar (ii) is not a magnet because no iron filings have been attracted by it.

Question 11.
A toy car has a bar magnet laid hidden inside its body along its length. Using another magnet i how will you find out which pole of the magnet is facing the front of the car?
Solution:
If the front of the toy car gets attracted to the north pole of the given magnet then it is the south pole of the bar magnet hidden inside the car and vice-versa.

Question 12.
Match column I with column II (One option of I can match with more than one option of II.

Solution:
(a) – (ii) , (iii) and (iv)
(b) – (iii)
(c) – (i)
(d) – (iii)

Question 13.
You are provided with two identical metal bars. , One out of the two is a magnet. Suggest two ways to identify the magnet.
Solution:
There can be following ways to identify the magnet out of the two identical metal bars :
(i) By freely suspending the metal bars. Magnet will rest along a particular direction.
(ii) By attracting iron filings.
(iii) By using another magnet. Like poles will repel each other while unlike poles will attract each other.

Long Answer Type Questions

Question 14.
Three identical iron bars are kept on a table. Two out of three bars are magnets. In one of the magnet the North-South poles are marked. How will you find out which of the other two bars is a magnet? Identify the poles of this magnet.
Solution:
The magnet on which the North-South poles are marked can be used to find out the magnet out of two bars.
The magnet with known poles will attract and repel two ends of a magnet while it will attract both the ends of an ordinary bar. This process is known as test for repulsion. To find out the poles of unknown magnet, we can use the same test. North pole marked on the given magnet will repel the north pole of unknown magnet.

Question 15:
Describe the steps involved in magnetising an iron strip with the help of a magnet.
Solution:
Steps involved in magnetising an iron strip are:
(i) Take an iron strip which is to be magnetised.
(ii) Keep it on a wooden table.
(iii) Hold one end of a bar magnet in your hand and keep the other end of bar magnet near one edge of iron strip.
(iv) Without lifting, move it along the length of iron strip till you reach the other edge.
(v) After reaching the end of iron strip, lift the bar magnet and bring it to the same position and repeat the process again and again.

(vi) Bring some iron filings near the iron strip to check whether it has become a magnet. If not, continue the same process for some more time.

Question 16:
Given below is a figure which shows a magnetic campass. Briefly explain what will happen to the position of its needle if you bring a bar magnet near it? Also, draw a diagram to show the effect on the needle on bringing the bar magnet near it. Also, draw the diagram to show the effect when the other end of the bar magnet is brought near it.

Solution:
If we bring a bar magnet near a magnetic compass N, its needle will get deflected.

When we bring North pole of a bar magnet near the magnetic compass, its needle will be deflected away from the magnet as shown in Fig. (i). However, when we bring South pole of bar magnet near the magnetic compass, needle will be deflected towards the magnet as shown in Fig. (ii).

Question 17.
Suggest an activity to prepare a magnetic compass by using an iron needle and a bar magnet.
Solution:
To prepare a magnetic compass, the given iron needle is magnetised by rubbing a bar magnet over it repeatedly in a particular direction. After that it may be set in a way so that it can rotate freely when suspended. Hence, the iron needle can act as compass and give north-south direction.

Question 18:
Boojho kept a magnet dose to an ordinary iron bar. He observed that the iron bar attracts a pin as shown in figure.

What inference could he draw from this observation? Explain.
Solution:
When we place any iron bar near a bar magnet, the magnetic properties are induced in it and it acts like a magnet. The small objects like pin, iron filings can be attracted by it. But when we remove the bar magnet kept near it, it again becomes an iron bar and does not attract the small iron objects.

Question 19:
A bar magnet is cut into two pieces A and B from the middle as shown in figure.

Will the two pieces act as individual magnets? Mark the poles of these two pieces. Suggest an activity to verify your answer.
Solution:

Yes, the two pieces will work as individual magnets because a monopole (single pole) of magnet never exists.
Activity
(i) Place the magnet, so formed (A and B) on the table.
(ii) Bring the North pole of both magnets towards each other, they will be repelled.
(iii) Bring the North and South poles of both magnets towards each other, they will attract.
This proves that the two pieces will act as individual magnets having attraction and repulsion properties.

Question 20:
Suggest an arrangement to store a U-shaped magnet. How is this different from storing a pair of bar magnets?
Solution:
It is a suggested way shown in figure below :

U-shaped magnet is kept along with an iron piece across its two poles, while a pair of bar magnets is kept along with iron strips and magnets separated by wood along their length as shown in above figure.

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