Question

Which of the following is an example of the conversion of heat energy to mechanical energy?
1. Steam engine
2. Piezoelectric
3. Photosynthesis in plants
4. Geothermal power plant

Answer 1

Correct Answer - Option 1 : Steam engine

CONCEPT:

• The idealized heat engine is one that is operated in a reversible manner or engine that follows the Carnot cycle and has no internal friction and inefficiencies but those that are fundamental.
• Steam engine: The heat engine that converts heat energy of steam into mechanical energy to perform many works is called a steam engine.

EXPLANATION:

• When water is heated under pressure, it results in the formation of steam.
• Steam engines utilize the energy of the steam generated to perform mechanical functions by using it to push a piston which leads to motion. So option 3 is correct.