Question

State the limitation of extracting energy from tides
For two marks

Answer 1

The answer is : Limitations of extracting energy from above sources are

(a) A windmill requires wind of speed more than 15 km/h to generate electricity from wind energy. Also large numbers of windmills are required to get feasible output which covers a large area.

(b)       Very strong ocean waves are required in order to extract energy from waves. But these are not available all the time?

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

Answer 2

(a) Very few sea coasts in the world have suitable sites for the purpose of harnessing tidal energy.
(b) The rise and tall of tides happen only twice in a day and is not suffcient to generate electricity coutinuously.

hope this will help you.