Correct Answer - Option 3 : Electric bell
Concept:
Electric bell:
- It is a mechanical bell that functions by means of an electromagnet.
- When an electric current is applied, it produces a repetitive buzzing sound.
- It works on the principle of working of electromagnetism.
- Electromagnetism provide relation b/w electric and magnetic system.
Explanation:
Electric motor: It is an electrical machine that converts electrical energy into mechanical energy.
Electric magnet: This is the type of magnet in which the magnetic field is produced by an electric current.
Electric bell: It is used to convert electric energy into sound energy.
Electric heater: It converts electrical energy into heat energy by the principle of Joule heating of resistance material.
List of some energy conversion devices:
| Device |
conversion of energy |
| Dynamo |
Mechanical energy to Electrical energy |
| Electric motor |
Electrical energy into mechanical energy |
| Microphone |
Sound energy into electrical energy. |
| Electric bulb |
Electrical energy into light and heat energy. |
| Loudspeaker |
Electrical energy into sound energy |
| Solar cell |
Solar energy into light and heat energy. |
| Photoelectric cell |
Light energy to electrical energy |
| Form coal |
Thermal to electrical energy |
