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प्रश्न
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उत्तर
Natural magnet is the deposits of the iron ore which has the attracting property of iron The properties of the natural magnet are :
(i) The magnet has the directive property when it is suspended freely, it always comes in a north-south direction.
(ii) A magnet attracts magnetic substances like iron, steel, etc. so, it has an attractive property.
(iii) Like poles repels each other while unlike poles attract each other in magnet.
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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.
What is a magnetic compass ? State its use.
What is declination ? Draw a diagram to show the angle between the declination and true direction of geographic north.
Tick the most appropriate answer.
The surest test of magnetism is
Answer the following in short.
If a bar magnet is placed over iron filings, where will the attraction of the iron fillings be
- maximum?
- minimum?
Fill in the blank.
The perpendicular bisector of the line joining the two poles of a magnet is called ...................
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 |
Bar magnets are often stored in pairs as shown in the figure. E and F being pieces of metal.
Name the metal used for E and F.
Maximum iron filings stick in the middle of a bar magnet when it is brought near them.
Match the following:
| 1. | Electricity and magnetism | a. | Step-down transformer |
| 2. | Force on the conductor | b. | Hans Christian Oersted |
| 3. | Electric bell | c. | I LB |
| 4. | Ns <Np | d. | Electromagnet |
