Resistors, Resistance and Resistivity When there is a potential difference across two ends of a conductor, electrons move and the rate of flow of the electrons is what is called current. However, electrons move more easily through some conductors than others for the same a p.d.. The amount of opposition Read more…
How A Hydroelectric Power Station Works A hydroelectric power station is a power station that uses gravitational potential energy of dammed water to generate electricity. In a hydroelectric power station, water is dammed in a large reservoir to raise its gravitational potential energy. The difference in height of the water Read more…
How A Thermal Power Station Works A thermal power station is a power station that uses heat to generate electricity. In a thermal power station, water is boiled in large pressure vessels to produce high-pressure steam. The steam then drives a turbine connected to an electrical generator. The electrical generator Read more…
What is Chemical Energy? Chemical energy (chemical potential energy) is the energy stored in the bonds of a chemical substance and is released when the substance undergoes a chemical reaction. Examples of substances containing chemical energy Examples of substances containing chemical energy include: battery electrolytes food such as carbohydrates, fats Read more…