Advertisements
Advertisements
Question
How do you account for the following fact?
Bar magnets lose their magnetism when heated strongly.
Advertisements
Solution
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
RELATED QUESTIONS
Fill in the blank to complete the sentence :
Unlike poles of a magnet ___________ each other.
Fill in the blank to complete the sentence :
Like poles of a magnet ______________ each other.
Explain the meaning of the term induced magnetism.
Describe various methods of magnetising a piece of iron.
Explain a suitable experiment of magnetic induction?
A magnet is carefully broken into two halves along its long axis as shown in the figure. How would the magnetic strength of each piece compare with that of the original magnet?
Explain, what is meant by magnetic induction.
Give scientific reason:
A ' cracking' noise may be heard on removing a nylon shirt, blouse, or stockings.
Give scientific reason:
A charge can be obtained on a rubbed ebonite rod held in the hand but not on a rubbed metal rod held in the hand.
