write the working Principle of an electric bell . Draw a diagram of an electric bell and label it
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Answer:
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Explanation:
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Answer:
Hii user.....
Good evening....
Here is your answer.....
Electric bell....
The electric bell is a simple
household device based on the magnetic effects of current. It consists of a gong, an electromagnet, a soft iron rod (armature) and a Contact screw, all arranged in an electric circuit as shown in the diagram here.
Working of an electric bell
✓When current flows through the electromagnet it acquires
magnetism and attract thearmature.
✓As the armature bends towards the electromagnet, the gong is struck. But at
the same time contact between armature and contact screw gets broken
and the circuit gets switched off.
✓As the current flow stops (due to the break in the circuit), the electromagnet
(immediately) loses it magnetism. It, therefore, no longer attracts thearmature.
✓The armature gets pulled back to its original position by spring action.
It, now, again comes in contact with the contact screw; the circuit gets
Completed again. The cycle repeats itself and the gong gets struck again.
This, in turn, again breaks the circuit.
✓Due to this alternate making and breaking of the circuit (which takes place
very rapidly), the electric bell goes on ringing continuously as long as the
switch is kept pressed.
Explanation:
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Explanation:
