Advertisements
Advertisements
प्रश्न
How do you account for the following fact?
Bar magnets lose their magnetism when heated strongly.
Advertisements
उत्तर
Bar magnets lose their magnetism when heated strongly. Due to heat energy, the kinetic energy of the molecules of a barg magnet increases. Thus from straight-line molecular chains, they form closed molecular chains, and hence, magnetism is lost.
APPEARS IN
संबंधित प्रश्न
Fill in the blank to complete the sentence :
Unlike poles of a magnet ___________ each other.
Fill in the blank to complete the sentence :
A freely suspended magnet rests in the geographic ___________ direction.
Explain the meaning of the term induced magnetism.
How do you account for the following fact?
Steel makes better permanent magnet than soft iron.
What is magnetic induction?
Explain a suitable experiment of magnetic induction?
A conductor B is charged by bringing another charged body A in contact 
What will be the charge gained by B?
A conductor B is charged by bringing another charged body A in contact
Explain the process of charging B.
How would you test whether a piece of steel was magnetised
(i) If you had a magnet?
(ii) If there was no magnet available.
Give scientific reason:
A ' cracking' noise may be heard on removing a nylon shirt, blouse, or stockings.
