Question

describe the construction and working of an electric bell with the help of diagram

Answer 1

 

ELECTRIC BELL

  

MAIN COMPONENT OF 
ELECTRIC BELL

     Important parts of an electric     bell are :
    1. Electromagnet
    2. Armature
    3. Spring
    4. Armature rod
    5. Hammer
    6. Gong
One end of armature winding is connected to terminal T1 and the other to a spring, which is mounted on     a soft iron strip. A rod is attached to the armature and the free end of the rod carries a small hammer,     which strikes a bell. A very light spring is attached to a screw, which is joined to terminal T2.

WORKING OF ELECTRIC BELL

    The electric circuit is completed through a battery and push switch button connected to the terminal T1     and T2. When the push button is pressed the electric circuit is completed and the armature is attracted     towards the electromagnet as a result, the small spring gets detached from the screw due to which the     electric circuit is broken and the electromagnet is demagnetized. Hence, the attraction disappears and     the armature is brought back by the spring to its original position. Contact of the spring with the screw is     now remade, which completes the electric circuit. The action is repeated over and over again     consequently. The armature vibrates and hammer attached to it strikes the gong and the bell rings and     sound is produced.

Answer 2

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