Magnetic Force
Magnetic Force
A magnet attracts things made of iron (or steel). So, if we bring a magnet near iron nails or pins, the magnet pulls them towards it as shown in the figure. The magnet exerts a force on them is known as magnetic force. The magnetic force acts even from a distance. The magnet exerts a magnetic force on objects made of iron, steel, nickel and cobalt. It does not exert a force on objects made of copper, wood or glass.
A magnet can exert its magnetic force on iron objects from a distance without touching them, therefore, magnetic force is a non-contact force. The magnetic force between a magnet and an iron (or steel) object is always that of attraction.
A magnet also exerts a magnetic force on another magnet placed near it. The magnetic force between two magnets placed near one another can be that of 'attraction' or 'repulsion' depending upon which poles of the two magnets are facing one another. The like poles of two magnets repel each other whereas unlike poles of magnets attract each other. This means that there is a magnetic force of repulsion between the like poles of two magnets. On the other hand, there is a magnetic force of attraction between the unlike poles of two magnets. We do not have to bring the two magnets in contact with each other for observing the magnetic force between them. A magnet can exert a force on another magnet even from a distance, without touching the other magnet (or without being in contact with the other magnet). So, the magnetic force exerted by one magnet on the other magnet is an example of a non-contact force. We will now perform an activity to show the magnetic force of attraction as well as repulsion between two bar magnets.
The magnetic force is widely used in our everyday life. For example,
1. Many toy work due to the magnetic force exerted by magnets fixed inside them.
2. The magnetic strip help to keep the refrigerator door closed tightly.
3. Certain stickers stick to the iron object like steel almirahs, refrigerators, etc., without any glue. Such stickers contain tiny magnets and hence stick to the iron objects due to magnetic force.
4. The magnetic force exerted by powerful electromagnets is used to separate scrap iron objects from among a heap of waste materials.
Why does certain stickers stick to the iron object like steel almirahs, refrigerators, etc. ? | |||
| Right Option : A | |||
| View Explanation | |||
Magnetic force is a type of _______________ | |||
| Right Option : B | |||
| View Explanation | |||
The magnetic force between a magnet and a magnetic substance can cause ___________________.
| |||
| Right Option : A | |||
| View Explanation | |||
Students / Parents Reviews [10]
Abhyas is a complete education Institute. Here extreme care is taken by teacher with the help of regular exam. Extra classes also conducted by the institute, if the student is weak.
Om Umang
10thA marvelous experience with Abhyas. I am glad to share that my ward has achieved more than enough at the Ambala ABHYAS centre. Years have passed on and more and more he has gained. May the centre flourish and develop day by day by the grace of God.
Archit Segal
7thAbhyas Methodology is very good. It is based on according to student and each child manages accordingly to its properly. Methodology has improved the abilities of students to shine them in future.
Manish Kumar
10thIt was a good experience with Abhyas Academy. I even faced problems in starting but slowly and steadily overcomed. Especially reasoning classes helped me a lot.
Cheshta
10thMy experience with Abhyas is very good. I have learnt many things here like vedic maths and reasoning also. Teachers here first take our doubts and then there are assignments to verify our weak points.
Shivam Rana
7thAbout Abhyas metholodology the teachers are very nice and hardworking toward students.The Centre Head Mrs Anu Sethi is also a brilliant teacher.Abhyas has taught me how to overcome problems and has always taken my doubts and suppoeted me.
Shreya Shrivastava
8thBeing a parent, I saw my daughter improvement in her studies by seeing a good result in all day to day compititive exam TMO, NSO, IEO etc and as well as studies. I have got a fruitful result from my daughter.
Prisha Gupta
8thOne of the best institutes to develope a child interest in studies.Provides SST and English knowledge also unlike other institutes. Teachers are co operative and friendly online tests andPPT develope practical knowledge also.
Aman Kumar Shrivastava
10thIt has a great methodology. Students here can get analysis to their test quickly.We can learn easily through PPTs and the testing methods are good. We know that where we have to practice
Barkha Arora
10thMy experience with Abhyas academy is very good. I did not think that my every subject coming here will be so strong. The main thing is that the online tests had made me learn here more things.
