Physics: Unit 1.3 and 4: Methods we use to generate electricity and the usefulness of electrical appliances 0.0 / 5 ? PhysicsEnergyGCSEAQA Created by: shcooolCreated on: 25-05-15 19:10 What does the amount of energy transferred depend upon? How long the appliance is swithced on and its power 1 of 12 How do you calculate the amount of energy transferred? E = P*t (energy is measured in kWh 2 of 12 How is water used to produce energy? Water is heated, and the steam produced drives a turbine which turns the electrical generator 3 of 12 Give examples of energy sources that heat water fossil fuels (coal, gas and oil), uranium and plutonium (energy from nuclear fission)O, biofuels 4 of 12 How else may a turbine be driven? water and wind directly - wind, waves, tides and hydroelectric power 5 of 12 How else may electricity be produced? the sun's radiation which solar cells convert 6 of 12 What is geothermal energy? Energy produced from the steam from the hot water is some volcanic areas 7 of 12 Give examples of small-scale electricity production HEP in mountainous areas and solar cells in road signs 8 of 12 What are the effects of different energy sources? the release of substances into the atmosphere, the production of waste materials, noise and visual pollution, the destruction of wildlife habitats 9 of 12 What is the National Grid? The network of cables and transformers used to transfer electricity from power stations to consumers 10 of 12 How do you reduce the energy losses in cables? By reducing the current - increasing the voltage for a given power 11 of 12 What do step-up and step-down transformers do? They change the voltage for cabels and homes 12 of 12
Revision: Electric Circuits, Generating electricity, making use of energy and Domestic electricity 0.0 / 5
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