Q36 of 269 Page 141

The minimum speed of wind necessary for the satisfactory working of a wind generator to produce electricity is about :

A wind turbine is a device that converts the wind's kinetic energy into electrical power.

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34

The radiations present in sunlight which make a solar cooker work are

 35

In order to make an efficient solar cooker, the cover box should be made of :

 37

If the solar constant is 1.4 kW/m2, then the solar energy received by 1 m2 area in one hour is :

 38

A solar cooker may not cook food if :