Supply and demand
1 mark · EasyWhich of the following best describes why wind farms cannot be relied on to meet sudden increases in electricity demand?
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Correct option: Wind speed and direction are unpredictable.
Common mistakes: They take many hours to start up.; They are very expensive to run.
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Marking points
A1 · 1 mark · Correct choice: Wind speed and direction are unpredictable.
Worked solution
Wind farms rely on wind, which can change unexpectedly preventing reliable supply increases.