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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?
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उत्तर
When an iron bar is magnetized, it slightly increases in length due to the setting of molecular magnets along straight chains. So, on precisely measuring the length of the knitting needle, the knitting needle which is slightly longer in length than the other is magnetized.
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संबंधित प्रश्न
Select the correct option:
The place around a magnet where its influence can be detected is called:
Describe, how you will proceed to determine the position of the pole of a bar 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.
Define the term Effective length of a magnet
State three important properties of a magnet.
Give scientific reason:
Not attraction but repulsion is a sure test of magnetism.
Distinguish between
Natural and artificial magnets.
Define the terms magnet and magnetism.
