8634230
Description
Flashcards by Emma Samuelson, updated more than 1 year ago
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Created by Emma Samuelson
almost 7 years ago
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| Question | Answer |
| Which piece of equipment is used to generate electricity? | Generator |
| What happens in a boiler? | Water or a liquid is heated to produce steam which will spin a turbine. |
| Which fossil fuels can be burnt to heat the boiler? | Coal, oil, gas |
| What is the purpose of the turbine? | To power the generator to generate electricity. |
| Define "renewable energy resource" | A resource that will not run out i.e wind |
| Biofuel is carbon neutral, what does this mean? | It took C02 out of the air using photosynthesis, so burning it has no overall effect on C02 emissions. |
| Which elements are used to fuel nuclear power stations? | Uranium and Plutonium |
| Which type of renewable powerstation uses falling water? | Hydroelecric |
| Which renewables do not use the sun as the original source of their energy? | Wind, hydroelectric, tidal, geothermal, biomass, wave. |
| Which type of renewable does not need a generator? | Wave |
| What is the difference between a solar cell and a solar panel? | Solar cells generate electricity whilst solar panels heat water. |
| Which gas, released from burning coal, produces acid rain? | Sulphur dioxide |
| Which fuels are non-renewable? | Coal, oil, gas, nuclear |
| State one advantage and disadvantage of nuclear power? | It is expensive to build but cheap to run once going. (Any plausible answer) |
| Which type of transformer raises the voltage of electricity? | Step-up transformer |
| What is the voltage of the mains in the UK? | 230v |
| Why do we use high voltage and not high current in our power cables? | To make it more efficient so not as much heat is not lost. |
| State two disadvantages of using underground cables than overground cables? | Hard to get to if something goes wrong and more time consuming and therefore expensive to build. |
| What do we call the collection of wires and pylons that carry electricity around the country? | The National Grid. |
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