Multiple choice

Consider the following facts about wind energy.

  1. The amount of energy produced by wind turbine is directly proportional to the size of the rotor blade.
  2. Kites are a potential answer to harnessing high altitude winds into electrical power.
  3. Currently, wind energy contributes to only about 2.5% of total world energy production.

Which of the above are true?

  1. 1 and 2

  2. 2 and 3

  3. 1 and 3

  4. All three
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The amount of energy produced by your wind turbine is proportional to the size of the rotor used, when all other factors have been taken into consideration. A bigger rotor certainly generates more power.

Kites provide a cheap and easy way to harness the power of the wind at high altitude, and are a key research area towards development of airborne wind farms. An airborne wind turbine is a design concept for a wind turbine that is supported in the air without a tower and itcarries the advantage of tapping an almost constant wind, without requirements for slip rings or yaw mechanism, and without the expense of tower construction. Wind power contributes to around 2.5% of world electricity generation, and is estimated to be growing at 25% per annum.

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