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Flashcards in Generating Electricity Deck (4)
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what are the negative effects of different energy resources?

release of substances in the atmosphere

waste materials

noise and visual pollution

destruction of wildlife habitats


what are the start up times for different sources?

oil, gas - quick start up and can release more energy during peak times

coal, nuclear - slow start up times, release a constant amount


In the National Grid, why do they increase the voltage?

for a given power increasing the voltage reduces the current required and this reduces the energy losses in the cables


How do transformers used by the national grid?

step up - increases voltage

step down - decreases voltage

power stations produce electricity at 25k V

the power lines carry electricity at 275k V

homes use electricity at 230 V