S278_2 Glossary
S278_2 Glossary.
Saturday, 25 January 2025, 8:37 PM
Site: Open Learning
Course: An introduction to energy resources (S278_2)
Glossary: S278_2 Glossary
P
PhotosynthesisA chemical reaction in green plants in which carbon dioxide from the atmosphere combines with water to form carbohydrates, using the energy of solar radiation. |
Photovoltaic (PV) effectThe result of electrons being freed from impurities in semiconductors by the quantum energy of light photons, so that the electrons move to generate both electrical potential and current. The principle behind solar cells. |
Potential energyMechanical energy that exists by virtue of position or potential in a force field — usually that of gravity. |
PowerThe rate at which energy is delivered or work is done, measured in watts (W). One watt is equivalent to one joule per second. |
Primary energyThe energy released by directly burning fossil fuels or consumed at source in electricity generation. |