Electric light energy and power

Electric light energy and power

Electricity plays so large a part in the modern world that it would be difficult to. imagine life without it. Energy generated by hydro-electric and nuclear power stations is transmitted cheaply to big towns and industrial areas and its distribution in country districts eases the labours of farmers and dairy workers. The advantage of electric energy is the ease with which it may be transferred to light, heat, and other forms of energy. Electric light is taken for granted almost everywhere, and in most homes radio and television are regarded as necessities. People appreciate the cleanliness and convenience of electric heating and cooking, and their daily toil is lightened by electric washing machines, polishers and vacuum cleaners. The wellequipped house may have more than a dozen items of electrical equipment, ranging from the refrigerator to the electric razor. Underground electric railways have helped to solve the passenger transport problem in many of the big cities of the world, and the replacement of steam by electric power in factories makes for a cleaner atmosphere,

Fig. -41.1. Applications of the electric are

(a) Developed for use in lighthouses, this high pressure xenon arc lamp provides a luminous intensity of 1 million candelas, yet it is only about 30 cm long. (The candela is a unit of luminous intensity approximately equal to that of a candle)

Electric light energy and power
Electric light energy and power

(b) Steel melting furnace of 80 tonnes capacity. T E trodes have just been withdrawn and the roof swu prior to top charging

Electric light energy and power
Electric light energy and power
Electric light energy and power
Electric light energy and power
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