Question 2 :
,<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1c676f59b460d7261e602.jpg' /> Four identical iron bars were dipped in a heap of iron filings one by one. The above figure shows the amount of iron filings sticking to each of them. Which of the iron bar is likely to be the strongest magnet ?

Question 3 :
It was observed that a pencil sharpener gets attracted by both the poles of a magnet although its body is made of plastic. Name a material that might have been used to make some part of it.

Question 4 :
In olden days, sailors used to find direction by suspending a piece of _______.

Question 5 :
A tailor was stitching buttons on his shirt. The needle has slipped from his hand on to the floor. Can you help the tailor to find the needle?

Question 6 :
Fill in the blank: When a bar magnet is broken; each of the broken part will have ................ pole/poles.

Question 7 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1c6e0f59b460d7261e645.jpg' /> Does the magnet with iron filings sticking to it, look like any one of those shown in above figure?

Question 8 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1c672f59b460d7261e5fc.jpg' /> A bar magnet is cut into two pieces A and B, from the middle, as shown in figure above Will the two pieces act as individual magnets?

Question 9 :
A magnet was brought from different directions towards a toy boat that has been floating in water in a tub. Boat gets attracted towards pole magnet. Which of the following is a reason for this?

Question 10 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1c6e6f59b460d7261e64e.jpg' /> A person magnetises an iron needle using a bar magnet. Now, he inserts the magnetised needle through a small piece of cork or foam. He lets the cork float in water in a bowl or a tub making sure that the needle does not touch the water as shown in the above figure. He rotates the cork, with the needle fixed in it, in different directions. He then notes the direction in which the needle points when the cork begins to float again without rotating. Does the needle always point in the same direction, when the cork stops rotating ?

Question 11 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1c6e9f59b460d7261e653.jpg' /> A person takes two small toy cars and labels them A and B. He places a bar magnet on top of each car along its length and fix them with rubber bands as shown in the figure. In car A, keep the south pole of the magnet towards its front. Place the magnet in opposite direction in car B. Now, he places the toy cars close to each other such that the rear side of car A faces the front side of car B as shown in the figure. Do they move as before?

Question 12 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1c6e3f59b460d7261e64a.jpg' /> Spread some iron filings on a sheet of paper. Now, place a bar magnet on this sheet. Do you observe that more iron filings get attracted to some parts of the magnet than others as shown in the figure?

Question 13 :
N - N shows positions in which one pole of a magnet is placed near that of the other. Which of the following action indicates this?

Question 14 :
Paheli and Boojho went to a place where a lot of waste material was piled into huge heaps. Something exciting was happening! A crane was moving towards the heap of junk. The long hand of the crane lowered a block over a heap. It then began to move. What will happen next?

Question 15 :
A magnet was brought from different directions towards a toy boat that has been floating in water in a tub. Boat moves away from the magnet when north pole is brought near its head. Which of the following is a reason for this?