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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
Explain why, a freely suspended magnet always points in the north-south direction.
The wire in Figure below is being moved downwards through the magnetic field so as to produce induced current.
(a) moving the wire at a higher speed?
(b) moving the wire upwards rather than downwards?
(c) using a stronger magnet?
(d) holding the wire still in the magnetic field?
(e) moving the wire parallel to the magnetic field lines?
How do you account for the following fact?
Soft iron keepers help to prevent the magnets from losing their magnetic properties.
Complete the following diagram of magnets to show the lines of force.
What are the properties of a magnet?
State whether true or false. If false, correct the statement.
Magnetic field lines always repel each other and do not intersect.
The magnetic field lines are stronger near the ______ and it diminishes as you go away from it.
State the inference drawn about the direction of the magnetic field lines on the basis of the following diagrams.
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 |
| Figure 'a' | Figure 'b' |
"Magnetic field is a physical quantity that has both direction and magnitude." How can this statement be proved with the help of magnetic field lines of a bar magnet?
