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प्रश्न
Name one device that uses an electromagnet.
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उत्तर
Electric bell
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संबंधित प्रश्न
The incomplete diagram of an electric bell is given in Figure. Draw winding of coil on the core and complete the electric circuit in the diagram.
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How is an electromagnet made? Name two factors on which the strength of magnetic field of the electromagnet depends.
You are required to make an electromagnet from a soft iron bar by using a cell, an insulated coil of copper wire and a switch.
- Draw a circuit diagram to represent the process.
- Label the poles of the electromagnet.
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Name one device that uses an electromagnet.
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Name the material used for making the armature of an electric bell. Give a reason for your answer.
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Explain the working of the following device.
Speaker
Explain the working of the following device.
Magnetic levitation trains.
