The force exerted by a magnet on the various magnetic substance is called magnetic force. The magnetic force is a non contact force that is it is effective from a distance. Obviously, there must be some influence of the magnet on the space around it. This influence reduces as we go further away from the magnet. The area where the magnetic force is applicable is called magnetic field. This magnetic field causes attraction or repulsion between them. A magnetic compass always points in the N—S direction when it is placed away from any magnet. If we bring a magnet near the compass, the compass needle will show deflection and will get aligned in a new direction depending upon the placement of the bar magnet. This shows that a magnet changes the magnetic properties of space around it.
Thus, there is a region around the magnet where its magnetic influence can be felt. This region is called the magnetic field of the magnet.
Magnetic field lines show the direction of the magnetic field. To find the magnetic field line place the compass near one end of the bar magnet and stepwise move the compass in a direction in which north pole of compass points and each time mark the position of compass without disturbing the bar magnet.
Finally, you will get a line starting from North Pole and ending at South Pole of bar magnet as shown in the figure. You can draw many such lines around the magnet by changing your starting point from North Pole, using compass. These lines are called Magnetic Field Lines. They are a way to visualize the magnetic field. When drawn the distance between them is an indication of the strength of the field. The closer they are the stronger is the field. Also, the direction of the tangent to the field line is the direction of the magnetic field at that point. A free north pole would move along the magnetic field line.
Properties of Magnetic Field Lines: The various properties are
1. Magnetic field is pictorially represented by magnetic field lines.
2. These lines indicate the direction in which a North Pole would move if it can be isolated
3. Tangent to the curves at a point on magnetic field lines gives the direction in which a test north pole will experience a force if it is placed at that point.
4. Inside the bar magnet, field lines are directed from south to north.
5. Magnetic field lines start North Pole and go towards the South Pole and inside the magnet they move from south to north. Hence it is a closed curve.
6. Strength of magnetic field at a point is shown by the density of the field lines. The closer the field lines, the greater will be the strength of the magnetic field, and vice—versa.
The influence of magnetic field _______________________ as we go further away from the magnet. | |||
Right Option : B | |||
View Explanation |
Which term describes the area around a magnet in which magnetism is felt? | |||
Right Option : D | |||
View Explanation |
Magnetic line of force are ____________ | |||
Right Option : D | |||
View Explanation |
A 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.
My 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.
Abhyas 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.
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.
About 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.
It 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
It was good as the experience because as we had come here we had been improved in a such envirnment created here.Extra is taught which is beneficial for future.
One 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.
My 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.
My experience was very good with Abhyas academy. I am studying here from 6th class and I am satisfied by its results in my life. I improved a lot here ahead of school syllabus.