Urban Problems Related To Energy

Urbanization :

Urbanization is the movement of human population from rural areas to urban areas for the want of better education, communication, health, employment, etc.,

Causes Of Urbanization :

Since cities are the main centers of economic growth, trade, transportation, education, medical, facilities and employment, rural people moves to cities.

Urban Sprawl :

About 50% of the world population lives in urban area and people from rural area is moving to cities for employment. Thus the urban growth is so fast and it is difficult to accommodate all the commercial, industrial, residental and educational facilities within a limited area. As a result there is spreading of the cities into sub-urban or rural areas. This phenomenon is known as urban sprawl.

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ELECTRICAL COMPARATORS AND ITS WORKING

Electrical Comparators are used as a means of detecting and amplifying small movements of a work contacting elements. An electrical comparator consists essentially of a pick-up head or transducer for converting a displacement into a corresponding change in current and a meter or recorder connected in the circuit to indicate the electrical change, calibrated to show in terms of displacement. Generally, an amplifier is needed to provide the requisite sensitivity and to match the characteristics of different parts of the circuit. Electrical comparators can be classified according to the electrical principle used in the pick-up head. Most of the comparators use either a differential transformer, an inductance bridge, a strain gauge or a capacitor as a means of detecting movement of the gauging element. There are different types of electrical comparators. One kind called an electrolimit gauge is used to check or measure the outside diameter of a roll. The objec...

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TOP POLLUTION RECORDED IN WORLD

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Mechinopedia For Mechanical Engineers

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