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प्रश्न
Name the material used for making the armature of an electric bell. Give a reason for your answer.
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उत्तर
The material used for making the armature of an electric bell is soft iron which can induce magnetism rapidly.
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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.
G-Gong, H-Hammer, A-Armature, C-Core, B-Battery.
Name one device that uses an electromagnet.
Electromagnets are made up of :
The following figure shows a coil wound around a soft iron bar XY.
- State the polarity at the ends X and Y as the switch is pressed.
- Suggest one way of increasing the strength of electromagnet so formed.
Name one device that uses an electromagnet.
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?
Unlike magnetic poles ______ whereas like poles ______.
Explain the working of the following device.
Speaker
Explain the working of the following device.
Magnetic levitation trains.
