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प्रश्न
How will you test whether a given rod is made of iron or not?
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उत्तर
Bring a magnet near the rod if the rod is attracted by the magnet then it will be made of iron else not.
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संबंधित प्रश्न
Explain the meaning of the term magnetic field ?
Answer the following in detail.
List four methods of magnetizing a magnetic substance.
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 |
Draw lines of force surrounding a bar magnet when it is placed in the magnetic meridian with its north pole pointing geographic, north.
Bar magnets are often stored in pairs as shown in the figure. E and F being pieces of metal.
Why are E and F placed in contact with the poles of the magnets as shown in the diagram?
What do you understand by the term magnetic declination?
A magnet attracts ______.
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?
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 |
Give the uses of magnets in everyday life.
