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.

Answer 1

1. LED

2. Motor,Transformer.

3. Heater

4. Microphone

5. Battery

Answer 2

The machines and devices which change energy from one from into another are given below:

1. Thermoelectric which change heat energy into electric energy

2. Geothermal which changes heat energy into electric energy

3. Heat Engines which are used in cars and convert heat into mechanical energy

4. Hydroelectric Dams which converts gravitational potential energy into electric energy

5. Electric Generators which convert kinetic energy or mechanical work into electric energy