Question

state the energy changes that occur in the following the unwinding of a watch springs, burning of coal while operating a steam engine? lighting of a torch bulb, electric generator or dynamo

Answer 1

State the energy changes that occur in the following :

(i) The unwinding of a watch spring.

(ii) Burning coal while operating a steam engine.

(iii) Lighting of a torch bulb.

(iv) An electric generator (or dynamo).

Answer 2

Answer:

(i). Potential energy to kinetic energy

(ii). Burning of coal- Chemical energy to Heat energy.

Steam engine- Heat energy to Mechanical energy

(iii). Electrical energy to Light energy

(iv). Mechanical energy to Electrical energy.