energy saving hour

Flowing or moving air is called wind. By the virtue of this motion, the wind possesses kinetic energy. A windmill is used to make practical use of wind energy. The force of the wind rotates the blades of the windmill. Wind should flow continuously with certain minimum speed (sa..

Commercial Unit of Energy - The SI unit joule is too small to express very large quantities of energy. Hence we use a bigger unit called kilowatt hour (kWh) to express energy. 1 kWh is the amount of energy consumed by an electrical gadget in one ..

Commercial Unit of Electrical Energy - Kilowatt - hour is the commercial unit of electrical energy. We have seen that power is the rate of energy consumed or delivered. If 1 joule of energy is used per second, we say that energy is used at..

Judicious use of Energy - In order to live and enable ourselves to do everyday work we need energy. The prosperity of a country depends upon the availability of energy. Huge amount of electrical energy is used to run the air conditioners, cold storage and oth..

The unit 'watt' is very small. Therefore, in actual practice we use a much larger unit called 'kilowatt'. It is equal to 1000 watts. Since electrical energy is the product of power and time, watt hour (W h) can also be considered as unit of electric energy. One watt ..

The SI unit joule is too small to express very large quantities of energy. Hence we use a bigger unit called kilowatt hour (kWh) to express energy..

Question 1 - Question: Name the following: 1) Two renewable sources of energy (non - conventional) 2) Two non-renewable or conventional sources of energy 3) Two forms of energy usually used at homes 4) The radiation emitted from a hot source 5) The component of sunligh..

It takes 1 2 hour on foot and 1 4 hour on a bicycle for Tim to reach his home. How much time does Tim save by going on his bicycle? => 25 minutes or 15 minutes or 20 minutes or 10 minutes..

The stocks of fuels are limited and hence use of energy saving devices is a must. As far as possible use only renewable sources of energy. More efficient heating installations should be employed while cooking. Incomplete combustion of fuel results in wastage of fuel le..

India produces only half of the national requirement of petroleum products and it imports the rest from other countries. Natural gas is the most popular petroleum product. During last two decades, the consumption of natural gas resources have increased tenfold. If we need to save fossil f..