Lakhmir Singh and Manjit Kaur Solutions for Chapter: Sources of Energy, Exercise 14: Multiple Choice Questions (MCQs)

The part of box-type solar cooker which is responsible for producing greenhouse effect is:

Solar cells are made of:

The value of the solar constant is:

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

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

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

If the solar constant is $1.4 \mathrm{kW}/{\mathrm{m}}^2$, then the solar energy received by $1 {\mathrm{m}}^2$ area in one hour is:

A solar cooker may not cook food if