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प्रश्न
Write a note on the 'magnetic field'.
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उत्तर
The magnetic field is defined as the region around a magnet where the magnetic force can be experienced by an object. Magnetic field lines are the geometrical representation of the magnetic field. Following are the characteristics of magnetic field lines:
- Magnetic field lines emanate from the North Pole and terminate at the South Pole of a magnet (outside the magnet).
- The degree of closeness of magnetic field lines represents the relative strength of the magnet.
- No two field lines can intersect each other.
Field lines due to a bar magnet are shown below:

Magnetic field lines due to a bar magnet.
संबंधित प्रश्न
What are the two ways in which you can trace the magnetic field pattern of a bar magnet?
Explain the method of plotting the magnetic field lines by using a small compass needle.
Figure. shows a bar magnet placed on the table top with its north pole pointing towards south. The arrow shows the north-south direction. There are no other magnets or magnetic materials nearby.

What is the magnitude of the magnetic field at each neutral point? Give a reason for your answer.
A dry cell can supply a charge of 800 C. If continuous current of 8.0 mA is drawn, calculate the time in which cells will discharge completely.
Define the isoclinic line.
Complete the following diagram of magnets to show the lines of force.

Distinguish between
Magnetic properties of iron and steel.
Inside the magnet, the field lines moves ____________.
Magnetic field lines determine ______.
A magnetic needle is kept in a non-uniform magnetic field. It experiences ______.
