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Three single phase transformers are used to form a three-phase transformer bank rated 13.8kV (delta)/120kV (wye). One side of the transformer bank is connected to a 120kV transmission line, and the other side is connected to a three-phase load of 12MVA at 0.8 power factor lagging. Determine the turns ratio of each transformer and the line current of the bank at the 120kV side.
Using a shorted stub to match load, what is the lenght of the line where the normalized input Y is 1 + jb . If the characteristic impedance of the shorted line is 40 ohms, what is the length of the stub length.
Discuss whether this is still true today, and what factors are moving wireless NICs into a more dominant role, if any.
Efficiency in a power transformer is 98.6 percent when loaded such that its copper losses are five times its core losses. Calculate the per unit resistance of this transformer.
How do we deal with a L1 cache that is Write-back Write allocate, and the L2 cache, which is a Write-through Write no-allocate?
For computer chip of 10mm (length), 10 mm(width) is operated by power of 0.345 watt, which surrounded by coolant material of temp of 70 F. The Internal energy rate is 3.5J/sec and kinetic energy rate is -4.5J/sec.
A volume charge density of K Coulombs per cubic meter resides uniformly within the material of a long cylindrical shell whose inner radius is 1 m and whose outer radius is 3 m. Find D and E in all regions.
What are two of the major considerations that factor in the design of a substation. Give a couple of examples of station layouts where these factors are clearly demonstrated. What typical grounding materials are used in substations.
Determine the minimum bandwidth, baud, and bandwidth efficiency for the following bit rates and modulation schemes - 8-QAM and 16-QAM. Fb = 2400 bps Fb = 4800 bps Fb = 9600 bps
the length of a short-circuited stub of characteristic impedance Z (OS) =100 ohmns which, upon placement in shunt with the line at the 1 + jbn admittance point, produces impedance matching on the line so that there exists no reflected wave to the ..
A sirloin steak (e'r = 52.4, µr = 1, tan dc = 0.33) is to be heated in a microwave oven operating at 2.45 Ghz. (a) Determine the uniform plane wave penetration depth. (b) Determine the complex impedance of the material.
A pipe of inner radius 4 cm, outer radius 6 cm, and infinate length is centered on the z-axis. Charge is evenly distributed within the wall of the pipe in the amount of 16 coulombs per meter length.Find and Plot the electric feild density as a fun..
DC-DC converter. You have 10 capacitors, each 1F. If you charge them in parallel from a 5V power supply, and then disconnect them and reconnect them in series: a. What is the equivalent capacitance seen by the power supply while charging.
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