Question

describe the working of electric bell

Answer 1

An electric bell consists of an iron core, on which is wound a wire as a coil. One end of the coil is connected to one terminal of a battery, and the other end to a steel rod that acts like a spring for the hammer touching the screw contact. The other terminal of the battery is connected to the screw contact with a switch in the middle.


Working of an electric bell

Electric current flows through the coil when the switch is ON, and the iron core acts as an electromagnet. The iron core attracts the hammer towards it. The hammer hits the bell and produces a sound. The circuit breaks at the screw contact when the hammer moves towards the iron core. At this point, the iron core ceases to be an electromagnet. The hammer is pulled back to its original position due to the spring action of the steel rod, and then touches the contact again to complete the circuit. The circuit is completed and current flows through the coil again, and the hammer strikes the bell again. The process repeats itself and you hear a ringing sound since the hammer keeps hitting the bell, until the switch is released.

Answer 2

Answer:

Structure - The Electric bell consist of -

1. Gong 2. electromagnet 3. hammer 4. soft iron armature

Working - when we press switch the electric current starts flowing in the circuit.

The electromagnet starts producing the magnetic field which attracts the iron

strip towards it as a result the hammer strikes the gong and sound is produced .

now as we release the switch , the electric current supply stops as a result the

iron strip come back to its initial position and bell stops ringing .