📖 Chapter 11 of 11 · Green Energy - Advance 1 · Class 8
Green Energy Glossary
- Alternating current (AC)
- Current that keeps reversing direction; India’s grid uses 50 hertz.
- Anemometer
- An instrument that measures wind speed.
- Bagasse
- Dry sugarcane fibre left after crushing, burned to make steam and power.
- Capacity factor
- The share of its full rating that a power plant actually produces over time.
- Chain reaction
- A process where each fission causes further fissions.
- Containment
- The strong concrete and steel building that encloses a nuclear reactor.
- Control rods
- Rods that absorb neutrons to control or stop a nuclear reaction.
- Direct current (DC)
- Current that flows in one direction, as from a battery or solar cell.
- Doping
- Adding tiny amounts of other elements to silicon to make n-type or p-type layers.
- Dosimeter
- A badge or device that measures how much radiation a person receives.
- Efficiency
- The share of input energy turned into useful output.
- Electrolysis
- Splitting water into hydrogen and oxygen using electricity.
- Ethanol
- An alcohol fuel made from sugarcane, grains or waste, blended with petrol.
- Fission
- Splitting a heavy nucleus into smaller ones, releasing energy.
- Fuel cell
- A device that combines hydrogen and oxygen to make electricity and water.
- Green hydrogen
- Hydrogen made by electrolysis powered by renewable electricity.
- Head
- The height through which water falls in a hydro plant.
- Inverter
- A device that converts DC into AC.
- Kilowatt-hour (kWh)
- A unit of energy: 1 kilowatt used for 1 hour (one “unit”).
- Moderator
- A material that slows neutrons in a reactor, such as heavy water.
- Nacelle
- The housing on top of a wind turbine holding the gearbox and generator.
- p–n junction
- The boundary between p-type and n-type silicon that drives current in a solar cell.
- Penstock
- The pipe carrying water from a reservoir down to a hydro turbine.
- Photon
- A tiny packet of light energy.
- Pumped storage
- A hydro plant that pumps water uphill to store energy and releases it later.
- Thorium
- A radioactive element India has in large amounts, planned as future nuclear fuel.
- Watt (W)
- The unit of power: the rate of using or making energy.