A transmission line has a span of 250 m between supports, the supports being at the same level. The conductor has a cross-sectional area of 1·29 cm2. The ultimate strength is 4220 kg/??2 and factor of safety is 2. The wind pressure is 40 kg/??2 . Calculate the height of the conductor above  ground level at which it should be supported if a minimum clearance of 7m is to be kept between the ground and the conducto

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A:

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A: Option d is correct 125%

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A: The correct solution can be achieved as follows.

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A: We need to select correct option ,

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A: C) surface

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A: Given, magnetic field B=0.6 T Current in conductor =I =800 A F= force length =l =2 m

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Electrical Heating Unit

The conversion of electrical energy to heat energy is known as electric heating. The heating system that converts the electrical energy to heat energy for various application is called electrical heating unit. Electricity is employed as the firing mechanism in electric heating systems, which transforms electric current to heat. Electric heaters have heating elements in the form of electric resistors.