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प्रश्न
State four important properties of a bar magnet?
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
Fill in the blank
To light a table lamp and to run a refrigerator, we use ______ as the source of electricity.
“Poles exist in pair”. Comment on this statement ?
What is a magnet?
Tick the most appropriate answer.
The surest test of magnetism is
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 ...................
A magnet remains steady in a ________ direction.
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 |
Thamizh Dharaga and Sangamithirai were playing with a bar magnet. They put the magnet down and it broke into four pieces. How many poles will be there?
Observe the pictures A and B given in Fig. 13.1 carefully.
Which of the following statement is correct for the above given pictures?
