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प्रश्न
Explain, why steel is used in preference to soft iron for making permanent magnets while soft iron is used in preference to steel for making electromagnets.
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उत्तर
Steel is used in preference to soft iron for making permanent magnets because steel acts as a magnet, even on the removal of inducing magnet and also steel has very high retention. Soft iron is used in preference to steel for making permanent magnets because soft iron behaves like a magnet as long as there is an inducing magnet and also soft iron has very poor magnetic retention.
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संबंधित प्रश्न
Why is soft iron used as the core of the electromagnet in an electric bell?
The strength of the electromagnet can be increased by
How is an electromagnet made? Name two factors on which the strength of magnetic field of the electromagnet depends.
Show with the aid of a diagram how a wire is wound on a U-shaped piece of soft iron in order to make it an electromagnet. Complete the circuit diagram and label the poles of the electromagnet.
State two ways through which the strength of an electromagnet can be increased.
Name one device that uses an electromagnet.
State two advantages of an electromagnet over a permanent magnet.
State two differences between an electromagnet and a permanent magnet.
Why is soft iron used as the core of the electromagnet in an electric bell?
Explain in detail the application of electromagnets.
