Energy Conversion Processes in Physics

Mr. Harris introduces energy conversion, explaining how different forms of energy can be transformed into others. He provides examples from daily life, such as dry cells converting chemical energy to electrical energy, and a spring toy converting potential energy to kinetic energy. The video also covers photosynthesis, where light energy is converted to chemical energy, and electricity generation using solar cells and steam engines. The process of coal power generation is detailed, highlighting the conversion of chemical energy to electrical energy. The video concludes with a summary of these concepts.

What type of energy is stored in dry cells before it is converted?

• Chemical energy

• Thermal energy

• Sound energy

• Kinetic energy

When a spring toy is compressed and released, what type of energy conversion occurs?

• Thermal to sound energy

• Light to chemical energy

• Chemical to electrical energy

• Potential to kinetic energy

Rubbing your hands together converts kinetic energy into which two forms of energy?

• Light and chemical energy

• Chemical and electrical energy

• Potential and kinetic energy

• Thermal and sound energy

What energy conversion takes place during photosynthesis?

• Electrical to sound energy

• Kinetic to potential energy

• Chemical to thermal energy

• Light to chemical energy

Which process involves converting light energy into chemical energy in plants?

• Evaporation

• Condensation

• Photosynthesis

• Combustion

In the context of solar cells, what type of energy is initially absorbed to generate electricity?

• Thermal energy

• Chemical energy

• Light energy

• Sound energy

What type of energy is primarily used in steam engines to generate electricity?

• Kinetic energy

• Chemical energy

• Thermal energy

• Sound energy

What is the primary role of turbines in a coal-powered power station?

• To convert chemical energy to light energy

• To convert steam energy to mechanical energy

• To convert thermal energy to chemical energy

• To convert electrical energy to sound energy

What happens to steam after it is used to turn turbines in a power station?

• It is stored for later use

• It is converted back to liquid water

• It is released into the atmosphere

• It is used to generate light energy

In a coal-powered power station, what is the initial form of energy in coal?

• Thermal energy

• Chemical energy

• Kinetic energy

• Electrical energy