Question

Name the appliances which work under the following energy transformation
a) sound energy into electric energy
b) heat energy into mechanical energy.

Answer 1

1. A sound energy is converted into Electrical energy in a transducer. The speech is converted into electrical signals which are converted back into speech at the other end.
2. Heat energy is converted into Mechanical energy in heat engines. In this case heat is used to convert water into steam which has energy enough to drive a piston.