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- The temperature dependence of resistance is also quantified by the relation R2=R1[ 1+(T2T1) ] where R1 and R2 are the resistances at temperatures T1 and T2, respectively, and is known as the temperature coefficient of resistance. If a copper wire has a resistance of 55 at 20C, find the maximum permissible operating temperature of the wire if its resistance is to increase by at most 20. Take the temperature coefficient at 20C to be =0.00382.Describe the following - Distributed Flexible Loads - Secondary Storage BatteryA 415 single core cable has a conductor diameter of 0.5 cm and a sheath of inside diameter 3 cm. In cable insulation, find: (i) minimum stress (in V/cm); (ii) maximum stress in (V/cm); (iii) Describe where these minimum and maximum stress will occur in cable insulation?; (iv) Suggest what should be the minimum dielectric strength (in V/mm) of the cable insulation to avoid any breakdown of the given cable
- An engineering student from TCC purchased a wire at IC marketing that has resistance of 960 ohms, 29.335 yards in long with cross sectional area of 66 CM. Determine what kind of material does the engineering had purchased. Assumed (T= 20°C)?1-Which type of power supply is required to power up a LVDT? does not matter AC no power supply required DC 2- In a flat-film strain gage having a rectangular cross section, if the thickness of the film is reduced by 20%, while all other parameters are kept constant, what is the ratio of the new resistance to the old resistance value?In a design task, a wire of 2000 m requires to exhibit a voltage drop of 2.5 Vwhen 3.2 A of current passes though it. Based on the Table Q1 (b) below, inyour opinion, which of the wire is the most suitable for aviation when the fuelsaving is another factor to be considered as well.
- Show solutions please. No VTH given.The currents drawn by the receivers in a given network are given in the figure. Accordingly, active taking into account the current distribution, the point where the greatest voltage drop occurs, and Determine the distribution of the balancing currents in the arms, taking into account their directions.When electricity is transported from a power station to a city, the line voltage (relative to ground) is usually on the order of several hundred thousand volts. A power line cable has a radius of a = 2.0 cm, is made of aluminum with a resistivity of ρ = 2.7×10−8 Ω ⋅ m, and spans a distance of l = 100 km from a power station to a city. The city consumes 100 MW of power (so I2RL =100MW). (a) Find the resistance of the power cable between the station and the city(i.e.,between points A and B). (b) Suppose that the line voltage ∆VBC = 120 V. i. How much current is required to flow through the power line to deliver 100MW of power to the city? ii. How much energy is lost as heat between points A and B? (c) Suppose that the line voltage ∆VBC = 300 kV. i. How much current is required to flow through the power line to deliver 100MW of power to the city? ii. How much energy is lost as heat between points A and B?
- Write the application of extra super tension that have rating 132KV and what used for?4. Give the reasons: (a) The AC resistance of a conductor is more than the DC resistance. (b) The resistance of a standard conductor is higher than the resistance of the solid conductor (c) The transposition of the overhead transmission line. (d) A charging current is existing in a line even when line is open circuited at the load end.Discuss the concept of FACTS (Flexible AC Transmission Systems) devices and their role in enhancing power system stability and control.