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प्रश्न
Answer the following in detail.
Write a short note on the theory of magnetism.
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उत्तर
All substances are made of minute particles. In a magnetic substance whether magnetized or non-magnetized), each individual particle behaves like an independent magnet. In the unmagnetized state, these particles within the substance are present in a random fashion such that they cancel out the magnetic effects of each other.
In a magnetized state, these particles align in a particle direction and the substance behaves like a magnet.
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संबंधित प्रश्न
What is a magnetic compass ? State its use.
Describe, how you will proceed to determine the position of the pole of a bar magnet.
Bar magnets are often stored in pairs as shown in the figure. E and F being pieces of metal.
Name the metal used for E and F.
The figure shows a freely suspended magnet in the rest position. Copy the diagram and on its show:
- Angle of declination
- Angle in dip
Define the following term:
Magnetic meridian
Artificial magnets are made in different shapes such as ______, _____ and _______.
MRI stands for _______.
The magnetic poles always exist in pairs.
Define electromagnet.
Give the uses of magnets in everyday life.
