Notes and Study material for Exams
Harnessing the Sun: A Deep Dive into Photovoltaic Electricity The sun, a celestial powerhouse, has been a source of fascination and wonder for humanity since time immemorial. Its radiant energy, a gift from the cosmos, has fueled life on Earth for billions of years. Now, in an era defined by the urgent need for sustainable … Read more
What is a Fuel Cell? A fuel cell is an electrochemical device that converts chemical energy from a fuel into electrical energy and heat. Fuel cells are similar to batteries in that they both convert chemical energy into electrical energy, but fuel cells do not run down and need to be recharged. Instead, they can … Read more
What is Geothermal Energy? Geothermal energy is heat from the Earth’s interior that can be used to generate electricity, heat homes and businesses, and provide hot water. The Earth’s core is very hot, about 6,000 degrees Fahrenheit (3,300 degrees Celsius). This heat comes from the decay of radioactive elements in the core. The heat travels … Read more
Ocean Thermal Energy Conversion (OTEC) is a renewable energy technology that uses the temperature difference between the warm surface water and the cold deep water of the ocean to generate electricity. OTEC is a promising source of clean, sustainable energy that has the potential to provide a significant portion of the world’s electricity needs. OTEC … Read more
Wave energy is a form of renewable energy that can be harnessed from the waves of the ocean. It is a clean and sustainable source of energy that has the potential to provide a significant amount of power to the world. Wave energy is generated by the rise and fall of the waves. As the … Read more
Photovoltaic Electricity Photovoltaic (PV) electricity is a type of solar energy that converts sunlight into electricity using semiconductors. PV cells are made of materials that allow electricity to flow when light hits them. When sunlight hits a PV cell, it knocks electrons loose from their atoms. These free electrons flow through the cell, creating an … Read more
What is Renewable Energy? Renewable energy is energy that comes from natural sources or processes that are constantly replenished. These include sunlight, wind, rain, tides, waves, and geothermal heat. Renewable energy does not produce greenhouse gases or other pollutants, and it is becoming increasingly affordable as technology improves. Why is Renewable Energy Important? Renewable energy … Read more