What kind of energy transformation takes place in the following devices: 

(i) Electric heater,
(ii) electric motor,
(iii) dynamo,
(iv) microphone,
(v) headphone,
(vi) hydro-electric power station,
(vii) steam engine,
(viii) solar battery,
(ix) photoelectric cell,
(x) electric cell. 

(i) Electric heater: Electrical energy into heat. 

(ii) Electric motor: Electrical energy into mechanical energy.

(iii) Dynamo: Mechanical energy into electrical energy.

(iv) Microphone: Sound into electrical energy.

(v) Headphone: Electrical energy into sound.

(vi) Hydroelectric power station: Mechanical energy into electrical energy.

(vii) Steam engine: Heat into mechanical energy.

(viii) Solar battery: Solar energy into electrical energy.

(ix) Photoelectric cell: Light into electrical energy.

(x) Electric cell: Chemical energy into electrical energy.