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प्रश्न
What are magnetic keepers? What are they used for?
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उत्तर
Magnetic keeper: A magnetic keeper is a ferromagnetic bar made from soft iron or steel, which is placed across the poles of a permanent magnet. Magnetic keepers are used to preserving the strength of the magnet by completing the magnetic circuit.
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संबंधित प्रश्न
Match the following
| Column A | Column B |
| (a). Human body | (1). electric bell |
| (b). Silk thread | (2). current |
| (c). Charge in motion | (3). conductor |
| (d). soft iron | (4). electromagnet |
| (e) . Electromagnet | (5). insulator |
Answer the following in detail.
How is the single-touch method of magnetism different from the double-touch method?
Write the answer in your word.
What are the practical uses of a magnet?
The alloys called ______ and ______ are used for making industrial magnets.
Select the correct option:
The place around a magnet where its influence can be detected is called:
The figure shows a freely suspended magnet in the rest position. Copy the diagram and on its show:
- Angle of declination
- Angle in dip
What is the connection between electricity and magnetism?
Define artificial magnet.
