Q2 of 33 Page 459

What is the minimum wind velocity required to obtain useful energy with a windmill?

A windmill is a device (mill ) that converts wind energy into electricity by using the blades of the windmill. The minimum velocity required by a windmill to obtain useful energy is 15 kilometres per hour.

wind.jpg


More from this chapter

All 33 →
1

State one limitation of solar energy available from solar cells.

 3

Explain why is the solar cooker box covered with a plane glass plate?

 4

List any four areas where solar cells are being used as a source of energy.

 5

Write two advantages of classifying energy sources as renewable and non-renewable.