What are the limitations of extracting energy from: (a) the wind? (b) waves? (c) tides?
(a) The Wind (i) It can be extracted only at limited sites where the wind blows most of the time in a year. (ii) The minimum speed of wind should be 15 km/h. (iii) Large area is required to build the wind farm/wind mills which is expensive affair. (iv) Efficiency, is low. (b) Waves (i) The place and time is limited when the waves are strong. (ii) Initial setup cost is expensive. (iii) Efficiency is low. (c) Tides (i) The areas where tidal energy can be harnessed is less. (ii) The efficiency is very low. (iii) The plants are not cost effective.
OptionA. One of the limitations of extracting energy from wind is that a windmill requires wind speeds more than 15 km/h to generate electricity. Also, a large number of windmills are required, which cover a huge area
