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Question

There are a number of devices in common use that change energy from one form to another. Name some devices that change
1.Electrical energy into light energy
2.Electrical energy into mechanical energy
3.Electrical energy into heat
4. Sound energy into electrical energy
5. Chemical energy into electrical energy.

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Solution

1. Electrical energy into light energy
Example; Electric bulb, LED, etc.

2. Electrical energy into mechanical energy
Example; Electric motor, compressor, etc.

3. Electrical energy into heat
Example; hair straightener, electric heater, etc.

4. Sound energy into electrical energy
Example; microphone, Piezoelectric transducers, etc.

5. Chemical energy into electrical energy
Example; electrical cell, coal, etc.


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