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प्रश्न
Explain a suitable experiment of magnetic induction?
उत्तर
Experiment: Take a freely suspended magnetic needle and bring near its south pole, the south end of a bar magnet. The needle gets longer affects the south and of the magnetic needle as shown in the figure.
Place a flat piece of iron AB, in between the bar magnet and magnetic needle. It is observed that the south end of the needle is repelled. Remove the iron piece AB. It is observed that needle. comes back to its original position. Repeat the experiment, but remove the bar magnet instead of iron piece. We will observe that the needle does not get repelled and remains continuously in its original position.
From this experiment, it is clear that a soft iron piece behaves as a magnet only when a bar magnet is placed near it, when a bar magnet is removed then soft iron piece loses its magnetism.
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संबंधित प्रश्न
Fill in the blank to complete the sentence :
The two ends of a magnet are called __________.
Fill in the blank to complete the sentence :
Like poles of a magnet ______________ each other.
Fill in the blank to complete the sentence :
A freely suspended magnet rests in the geographic ___________ direction.
'Induced magnetism is temporary'. Comment on this statement.
How do you account for the following fact?
Iron becomes magnetized when placed in a coil carrying direct current.
How do you account for the following fact?
Bar magnets lose their magnetism when heated strongly.
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.
