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प्रश्न
Draw a neat and labelled diagram of an electric bell and describe its working ?
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उत्तर
Working of the bell— Principle of working of electromagnetism When the switch is pushed on, the circuit gets completed and current stalls flowing through the U-shaped electromagnet which creates magnetic field in the core. This attracts the iron armature. Now when the armature moves towards the electro-magnet, the hammer strikes the gong and the bell rings. But as the armature
moves towards the electromagnet, the contact with the adjustment screw breaks which breaks the closed circuit and stops the current. Now when there is no current there is no electromagnetism and the armature returns to the original position. This making and breaking of the circuit of the electromagnet continues as long as the button remains pressed.
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संबंधित प्रश्न
Write true or false for a given statement.
In an electromagnet, the core is made up of copper.
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The incomplete diagram of an electric bell is given in fig. Complete the diagram and label its different parts ?
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