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प्रश्न
State four important properties of a bar magnet?
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उत्तर
- Attractive property: A magnet can attract small pieces of iron filing or other ferromagnetic materials.
- Directive property: If a magnet is suspended horizontally by a thin thread (say silk thread), it rests always pointing north-south direction of the earth.
- Like poles always repel each other and unlike poles attract each other.
- Poles always exist in pairs: Single pole can never exist.
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संबंधित प्रश्न
State two properties of a bar magnet ?
Explain the meaning of the term magnetic field ?
If a bar magnet is cut into equal pieces by cutting it at right angles to its axis at two places, ______ bar magnets are formed, and a total of _____ poles are formed.
Write the answer in your word.
What are the practical uses of a magnet?
With whom should I pair up?
| Group 'A' | Group 'B' |
| (a) Compass | 1. The highest magnetic force |
| (b) The door of a cupboard | 2. Like poles |
| (c) Repulsion | 3. A magnet |
| (d) Magnetic pole | 4. A magnetic needle |
Distinguish between the two methods of making artificial magnets.
An object that is attracted by magnet.
Consider the statement given below and choose the correct option.
Assertion: Iron filings are concentrated more at the magnetic poles.
Reason: The magnets are so sharp.
Why it is not advisable to slide a magnet on an iron bar back and forth during magnetising it?
The strongest natural magnet is ______.
