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Units of Electrical Energy

arjun — Thu, 18 Sep 2008 21:28:37 +0000

The capacity to do work is called energy.The most important types of energy are electrical energy,mechanical energy and thermal energy.Various units are assigned to each energy and since all these energies are interchangeable we could assign same unit of energy through out Electrical Energy The unit of electrical energy is watt sec or joule and is defined as One watt sec or joule of energy is transfered between two points if a potential difference of one volt exists between them and one ampere current passes between them for one sec. ie Electrical energy in watts or joules = voltage in volts ×current in amperes × time in seconds joule or wattsecond is practically a very small unit of energy and hence we use larger units like watt-hour and kilowatt hour. 1 watt hour = 1 watt × 1hour read more

Sources of Energy

arjun — Thu, 18 Sep 2008 16:31:31 +0000

Electrical energy is produced from various energy sources and some of them are listed below. 1) The Sun 2) The wind 3) Water 4) Fuels 5) Nuclear Energy Of this solar energy and wind energy is not exploited much since it has got many limitations the other energy sources like water,fuel and nuclear sources are used world wide. The sun the sun is considered as the prime source of energy.The energy radiated from sun can be focussed on a small area by means of some reflectors.And thus it produces heat and this heat could be used to make steam by heating water and this steam could be used to rotate a turbine coupled to an alternator which would convert the mechanical energy so produced in the turbine to electrical energy.But it has got many limitations since reflectors are needed in large read more

Generation of Electrical Energy

arjun — Wed, 17 Sep 2008 18:34:57 +0000

The conversion of different forms of energy available in nature into electrical energy is known as generation of electrical energy. The generation of electrical is just like the production of commodities like cloth,paper etc from the raw material in a similar manner electricity is manufactured from the natural resources available on the earth.But the difference is that other commodities are manufactured and consumed by users through market or by other means whereas electrical energy is produced and transmitted to the consumer where he needed and could use according to their need and all this process happens in a bit second.There are many technical and economical aspects regarding the the production of electricity in a commercial manner. Energy is available in various form in nature like read more

Importance of Electrical Energy

arjun — Wed, 17 Sep 2008 17:11:39 +0000

Electric Energy We need energy in various forms like heat,light,sound etc.The development new technology made it possible to convert electrical energy into any form of energy.This gives electrical energy an important position in the world.The running of the modern industrial structure depends on the low cost and the uninterrupted supply of electricity.In short we can say that a country is developed if the per capita consumption of electrical energy is much higher. Electrical energy is considered to be superior over other energy forms the following facts gives the proof for it Convenient energy form Electrical energy could be considered as the most convenient form of energy.It could be converted from one form into any other form.For example we know that a bulb glows when electricity read more