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प्रश्न
What is the magnetic induction? Explain with the help of a diagram.
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उत्तर
The property by which an ordinary piece of iron acquires magnetic properties temporarily due to the presence of another magnet close to it is known as magnetic induction
Take a long nail. Put it on the arm of a stand. Spread some iron pins on the base of the stand. You will find that the pins do not get attracted to the nail. Now touch a magnet at the end of the nail. As the end is brought close to the head of the nail, some pins cling to the nail. It happens because the nail turns into the magnet and acquires the properties of magnetism. The moment you remove the magnet from the head of the nail. The pins will fall down. It will no more be a magnet.
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संबंधित प्रश्न
There are two knitting needles. One of them is magnetized. How will you find out which one is magnetized, if no other magnet is available?
Draw a clearly labelled diagram, to show how a steel bar is magnetised by a divided touch method. A written description is not required.
Give scientific reason:
Two steel needles hanging from the lower end of a vertical bar magnet do not hang vertically.
Distinguish between
Natural and artificial magnets.
An object that is attracted by magnet.
One of the following is an example for a permanent magnet.
The strongest natural magnet is ______.
Define electromagnet.
