b) Electric bell works on the principle of ________
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ELECTRIC BELL WORKS ON THE PRINCIPAL OF ELECTROMAGNET......
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Answer:
Electric Bell works on the principle of magnetic effect of current, i.e. electromagnetism.
Explanation:
- It consists of a U shaped electromagnet in front of which is a soft iron strip or armature supported by a spring.
- The spring is connected with an adjustable screw.
- An iron hammer is attached to the armature or iron strip which can move to and fro depending on the movement of the iron strip.
- The armature carries at its back a strip of flexible steel which in normal position remains in contact with a screw.
- A metallic gong is fixed to the base board and hammer (striker) may strike on it.
- One end of the coil of the electromagnet is connected to terminal T1 and the other end is connected with the spring which through the adjustable screw is connected to the terminal T2.
7. When the terminals are connected to a battery and the switch is
pressed, the current flows through contact points via
electromagnet.
Hope this helps :D
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