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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
Give a reason for the following.
Iron is a magnetic substance.
Fill in the blank.
The perpendicular bisector of the line joining the two poles of a magnet is called ...................
How will you do this?
Find the north pole of a magnet.
Bar magnets are often stored in pairs as shown in the figure. E and F being pieces of metal.
What is the material of darkened part?
Explain the mechanism by which unmagnetized iron nails get attracted to a magnet when brought near it.
Give scientific reason:
Soft iron is used to make electromagnets.
People who made mariner’s compass for the first time.
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.
How can you identify non-magnetic materials? Give an example of a nonmagnetic material.
