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Question

What is the principle of an electric bell?


  1. Electrical energy is converted into sound energy

  2. Mechanical energy is converted into sound energy

  3. Electrical energy is converted into mechanical energy

  4. Mechanical energy is converted into electrical energy


Solution

The correct option is A

Electrical energy is converted into sound energy


An electric bell functions by means of an electromagnet. When an electric current is applied it causes a spring-loaded arm to repeatedly contact a metallic gong  which produces a repetitive buzzing or clanging sound. Therefore, an electric bell converts electrical energy into sound energy.

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