Question 1 :
Fill in the blank:
In a bar magnet, magnetic attraction is ............... near its ends.
Question 2 :
Bar magnets always point towards North-South direction. State true or false.
Question 3 :
A magnet was brought from different directions towards a toy boat that has been floating in water in a tub. Boat moves towards the magnet if north pole of the magnet is brought near its head. Which of the following is a reason for this?
Question 5 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1c677f59b460d7261e603.jpg' />
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 above figure . Which regions of the magnet have more iron filings sticking to it ?
Question 6 :
What will happen if a magnet is brought near a compass?
Question 7 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1c678f59b460d7261e604.jpg' />
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 above figure . The regions on which iron filling gets sticked is called?
Question 8 :
<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 10 :
In olden days, sailors used to find direction by suspending a piece of _______.
Question 11 :
In olden days, sailors used to find direction by suspending a piece of ___________.
Question 12 :
A magnet was brought from different directions towards a toy boat that has been floating in water in a tub. Boat is not affected by the magnet. Which of the following is a reason for this?
Question 13 :
S - 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 :
Fill in the blank:
North pole of a magnet can be identified by ____.
Question 17 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1c6e7f59b460d7261e650.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 two cars close to one another as shown in the figure. Do the cars run away from each other?
Question 18 :
A person rubs a magnet in the sand or soil and then pulls out the magnet. Now, he gently shakes the magnet to remove the particles of sand or soil. Are some particles still sticking to it?
Question 20 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1c6e2f59b460d7261e648.jpg' />
Is there any material common in all the objects in the table that were attracted by the magnet?
Question 21 :
The materials which are attracted towards a magnet are called _______.
Question 22 :
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 23 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1c673f59b460d7261e5fe.JPG ' />
Observe the pictures A and B given in above figure carefully . Which of the following statement is correct for the above given pictures ?
Question 25 :
The given shows different positions in which one pole of a magnet is placed near that of the other. The answer indicates the resulting action between the two poles.
[ N - ? ] = Attraction
Question 26 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1c6e5f59b460d7261e64c.jpg' />
A person takes a bar magnet and puts a mark on one of its ends for identification. Now, he ties a thread at the middle of the magnet so that he can suspend it from a wooden stand as shown in the figure. He makes sure that the magnet can rotate freely. Now, he lets it come to rest. He marks two points on the ground to show the position of the ends of the magnet when it comes to rest. Next, he rotates the magnet by gently pushing one end in any direction and lets it come to rest. Again, he marks the position of the two ends in its position of rest. Does the magnet now point in a different direction?
Question 27 :
<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 28 :
The different positions of magnet are shown in which one pole of a magnet is placed near that of the other. The answer indicates the resulting action between them for each situation. [ N - N ] = ?
Question 29 :
Artificial magnets are made in different shapes such as _______, _______ and _______.
Question 30 :
A compass can be used to find East-West direction at any place. State true or false.