power losses in transmission lines

These are commonly used in power distribution (at low frequencies) and in communications (at high frequencies). Biodiversity is most simply defined as the variety of life and its processes. A transmission line may be defined as a device for transmitting or guiding ene..

The transmission of power is made use of in hydraulic machines where a small force applied at one point is made to exert a much larger force at some other point. This principle is made use of in the working of a hydraulic press and hydraulic brake..

(i) Copper loss is the energy lost due to heating of copper coils of transformers. (ii) Iron loss due formation of induced current in the iron line resulting in lot of heat. (iii) Leakage of magnetic flux. All flux linked with primary may not be linked with secondary...

The transmission lines used in telephony are of two kinds: open- wire and cable. The open-wire lines are gradually being superseded by cable construction, either overhead or underground, for two principal reasons. In the first place, many more circuits can be accommoda..

Large amount of fossil fuels are burnt everyday in power stations to heat up water, to produce steam which further runs the turbines to generate electricity. The transmission of electricity is more efficient than transporting coal or petroleum over the same distance. Theref..

>Full names of the units do not begin with capital letter E.g., newton and not Newton. The symbols of units, named after a scientists, have initial capital letter. E.g., J for joule, K for Kelvin. Symbols do not have plural form. E.g., 5 kg (not 5 kgs), 25 m (not 25 metres). A unit symbol is repres..

The scatter plot shows John's weight loss recorded on a weekly basis by his doctor. In the scatter plot y represents John's weight in pounds and x represents the time in weeks. Write an equation for the line that best fits the data. => y = 2 x + 170 or y = - 5 2 x + 170 or y = 5..

In long-distance lines, losses are so high that satisfactory operation becomes impossible without the use of amplification. Amplifiers for telephone service are known as repeaters, and they must of course function in both directions along the line. Repeater stations ar..

Domestic Electric Circuit - Electric power is usually generated at places which are far from the places where it is consumed. Distribution of Electricity from Grid The power is transmitted over long distances at high voltage to minimize the loss of energy during t..

Domestic Electric Circuits - Electric power is usually generated at places which are far away from the places where it is consumed. At the generating station, the electric power is generated at 11,000 volts. This voltage alternates at a frequency of 50 Hz. The power is..