Question

Discuss one limitation each for the extracting of energy from (a)winds(b)tides

Answer 1

(a) Wind energy is harnessed by windmills. One of the limitations of extracting energy from wind is that a windmill requires wind of speed more than 15 km/h to generate electricity. Also, a large number of windmills are required, which covers a huge area.

(b) Very strong ocean waves are required in order to extract energy from waves.

(c) Very high tides are required in order to extract energy from tides. Also, occurrence of tides depends on the relative positions of the Sun, moon, and the Earth.

Answer 2

a) energy from winds can be extracted only from places where wind speed is high approx. about more than 15 km/h
b)energy from tides can only be attained when there are high or low tides