Alternative or Non-conventional Sources of Energy

The source of sun's energy is : 

"Flowing air has energy in it.". Explain.

Flowing air has energy in it.

How is electricity produced in a windmill?

The dimension of solar constant is ${\mathrm{M}}^1{\mathrm{L}}^1{\mathrm{T}}^{-3}$.

The dimension of solar constant is :

What do you mean by solar constant?

It is better to transport coal to a particular distance than to transport electricity over the same distance.

Why is it better to have thermal power plants near to coal reserves?

Which of the following is the best suitable location for a thermal power plant?

Thermal power plants are set up near to the coal or oil reserves.

There is no need of a back-up power when we are using the power from wind.

The towers and blades of wind mills require high maintenance.

Even though wind energy is a renewable energy, it is not suitable for all places. Why?

What are the main issues related with wind based power generation.

_____ rods are used as a moderator in the reactor of a nuclear power plant.

A ____ (solar/ galvanic) cell transforms the energy from the sun falling on it into electrical energy.

Geothermal energy is the heat energy from the hot rocks present inside the Earth.

The type of nuclear reaction which is responsible for the explosion of a hydrogen bomb is nuclear fission.

Name the semi-conductor material which is usually used for making solar cells.