Advertisements
Advertisements
प्रश्न
“Poles exist in pair”. Comment on this statement ?
Advertisements
उत्तर
The magnetic poles always exist in pairs. It is not possible to separate the two poles of a magnet.
If a bar magnet is broken at the middle in two parts each part is found to be a magnet. Each part has the property to attract the small iron pieces. Each part rests in the North-South direction when suspended such as to swing freely. This shows that the new poles are formed at the broken ends.
If these pieces are broken again and again, each part will still found to be a complete magnet. Each part contains both the poles (N-pole and S-pole). Thus, the two poles of a magnet exist simultaneously.
APPEARS IN
संबंधित प्रश्न
Select the correct alternative
A freely suspended magnet rests in
Draw diagrams of the artificial magnets of four different shapes?
How are the magnets kept safely? What is the role of keepers in storing the magnets?
How will you do this?
Determine whether a material is magnetic or non-magnetic.
When magnetic material is taken close to a magnet, the material acquires ______.
Fill the blank spaces in the table given below:
| Nature of bar | Action of compass needle | |
| North Pole | South Pole | |
| Non-magnetic | No action | ________ |
| ________ | attracted | attracted |
| North pole of a bar magnet | ________ | _________ |
| ________ | attracted | repelled |
Give scientific reason:
Soft iron is used to make electromagnets.
With the help of a diagram explain the following:
Magnetisation of steel needle using electric current such that the pointed end should have north polarity.
What are the factors that determine the strength of the magnet?
