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प्रश्न
Explain the mechanism by which unmagnetized iron nails get attracted to a magnet when brought near it.
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उत्तर
Every atom of an iron nail behaves like a tiny magnet. Due to the random orientations of these tiny magnets, the iron nail does not behave as a magnet.
But when an iron nail is placed near a magnet, then due to induced magnetism, all the atoms (tiny magnets) align themselves in a particular direction. As a result, the end of the iron nail nearer to the magnet acquires the opposite polarity and hence get attracted to the magnet.
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संबंधित प्रश्न
What is a magnet?
Define the following term regarding a bar magnet:
Magnetic equator
With whom should I pair up?
| Group 'A' | Group 'B' |
| (a) Compass | 1. The highest magnetic force |
| (b) The door of a cupboard | 2. Like poles |
| (c) Repulsion | 3. A magnet |
| (d) Magnetic pole | 4. A magnetic needle |
If a magnet is carefully broken into two pieces as shown in figure (i), how does the magnetic strength of each piece compare with that of the original magnet? If another magnet is carefully broken in half along its long axis shown in figure (ii), how would the strength of each piece compare with that of the original magnet?
Draw the magnetic flux pattern near a bar magnet placed with its axis in the magnetic meridian and the south pole pointing towards geographic north.
Draw a clearly labelled diagram, to show how a steel bar is magnetised by a divided touch method. A written description is not required.
Define the term Poles of a magnet
State three important properties of a magnet.
Explain the following:
Resistance of a conductor
List out the uses of magnets.
