Priyanka B Solutions for Chapter: Sources of Energy, Exercise 7: Multiple Choice Questions (MCQs)

For working of windmill the minimum speed of wind should be :  

The gas that is a mixture of methane, carbon dioxide, hydrogen and hydrogen sulphide is :

Gas cylinder used in home has : 

The gas that is a mixture of butane and iso-butane, is :

Upper atmosphere receives ________ $\mathrm{kJ}$ energy per square metre-second from sun.  

Solar energy is converted into thermal energy by a solar : 

Solar energy is converted into electrical energy by a solar : 

Which statement is correct about glass sheet used in solar heating devices?