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प्रश्न
A student who checked some magnets in the school laboratory found out that their magnetic force is worn out. Give three reasons for that?
उत्तर
Magnets lose their properties if they are:
- heated
- dropped from a height
- hit with a hammer
These are the reasons for that their magnetic force is worn out.
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संबंधित प्रश्न
Write true or false for a given statement.
A coil carrying current behaves like a magnet.
Fill in the blank
A magnet has ______ poles.
Write true or false of the following statement.
A magnet can attract only a magnetic substance.
Fill in the blank.
Rough handling destroys the .............. properties of a magnet.
How is an artificial magnet prepared from a natural magnet?
Answer the following.
What are magnetic substances?
Give a reason for the following.
Magnets are used to close the doors of a refrigerator tightly.
Magnets lose their property if they ______.
Match the following:
| 1. | Directive property | a. | Never intersect |
| 2. | Magnetic poles | b. | Magnetic compass |
| 3. | Lines of force | c. | Attract |
| 4. | Unlike poles | d. | Exist in pairs |
Match Column I with Column II (One option of A can match with more than one option of B)
| Column 1 | Column II | ||
| (a) | Magnet attracts | (i) | rests along a particular direction |
| (b) | Magnet can be repelled | (ii) | iron |
| (c) | Magnet if suspended freely | (iii) | another magnet |
| (d) | Poles of the magnet can be identified by | (iv) | iron filings |
