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प्रश्न
A coil of insulated copper wire is wound around a piece of soft iron and current is passed in the coil from a battery. What name is given to the device so obtained? Give one use of the device mentioned by you.
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उत्तर
The device formed is an electromagnet.
Use:
For separating the magnetic substances such as iron from other debris.
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संबंधित प्रश्न
Electromagnets are made up of :
How is an electromagnet made? Name two factors on which the strength of magnetic field of the electromagnet depends.
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.
How is the working of an electric bell affected, if alternating current be used instead of direct current?
Name the material used for making the armature of an electric bell. Give a reason for your answer.
Explain in detail the application of electromagnets.
Explain the working of the following device.
Magnetic levitation trains.
