State the energy changes in the following while in use:

(a) An electric bulb

(b) An electric oven

(c) A loudspeaker

(d) A microphone

(e) An electric motor

(f) A wind mill

(a) When an electric bulb glows, the electrical energy changes into heat and light energy.

(b) In electric oven, electrical energy changes into heat energy.

(c) In loudspeaker, electrical energy is converted into sound energy.

(d) A microphone converts sound energy into electrical energy.

(e) An electric motor converts electrical energy into mechanical energy.

(f) A wind mill converts mechanical energy into electrical energy.