JAMB Physics 2018 Paper

Concept:Energy is transformed from one form to another in a definite order as it flows from the steam engine through the generator to the lamp.Explanation:The steam engine receives heat energy from burning fuel or steam.This heat energy is converted into kinetic energy of the moving parts of the engine.The moving turbine or engine shaft drives the generator.The generator then converts this kinetic energy into electrical energy.Finally, the electrical energy reaches the lamp.The lamp changes electrical energy into both heat energy and light energy while glowing.Therefore, the correct sequence of energy changes is:$$\text{Heat} \rightarrow \text{Kinetic} \rightarrow \text{Electricity} \rightarrow \text{Heat and Light}$$Answer:C. heat $\rightarrow$ Kinetic $\rightarrow$ Electricity $\rightarrow$ Heat and Light