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Flashcards in Generating Electricity Deck (4)
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1

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

2

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

3

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

4

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