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Show that the time-average value of the magnitude of the Poynting vector given by (4.68) is one-half its peak value. For an antenna radiating a time-average power of 150 kW, find the peak value of the electric field intensity at a distance of 100 km from the antenna. Assume the antenna to be radiating equally in all directions.
Compare the equivalent and nominal π-model for the line; At the full load the line delivers 800 MW at 0.9 leading power factor and at 480 kV to the receiving end load. Calculate voltage regulation and efficiency of the line
Write a good engineering report on high voltage power transmission line design and operation. Establish the need to calculate the electric and magnetic field profiles underneath electric power transmission lines.
A three-phase transmission line having a reactance of 120 ohms per phase is connected to a wye-connected load whose resistance is 160 ohms per phase. If the supply volatge is 70kV line-to-line, calculate
A cast steel magnetic circuit with N = 2500 turns, I = 200 mA, and a cross sectional area of 0.02 m2 has an air gap of 0.00254 m. Assuming 90% of the mmf appears across the gap, estimate the flux in the core.
A date link protocal uses the CRC16 polynomail for error detection A) suppose the data block (including the 16 check bits) has n=1000 bits how many possible received black are there. B)On a particular transmission a lot of errors occur in the receive..
A gas occupying a volume of 25 ft3 weights 3.5 lbs on the moon, where the acceleration of gravity is 5.47 ft/s2. Determine its weight, in lbf, and density, in lb/ft3, on Mars, where g= 12.86 ft/s2.
how tall must the antennas be if the link operates on a frequency of 1450mhz d17miles d211miles and the obstruction is
Consider a discrete time LTI system with impulse response given by h[n] = u[n + 2] - 2u[n - 1] + u[n - 4]. A. Determine the transfer function H(z) for this system. B. Determine the z transform Ys(z) of the step response for this discrete time LTI ..
An intergrated circuit temperature probe is rated at 0-10 volts dc over a 0-175 degrees Celsius range. What is the temperture when the output voltage is 3.65 volts dc
Find the associated answers for: total circuit impeadance (Zt), Current source (RMS), Vc (RMS) w/ power factor, Vr (RMS), all in complex form/ rectangular form. Remember each question has to be done three times, one for each frequency.
The Ic was measured for different values of a load resistance. It was noticed that Ic was pretty much constant for the first 1900 ohms values, but then it suddenly decreased. Why did that happen
The inferred absolute temperature for copper is -243.5C. If the resistance of a copper wire is 10 ohms at 25C, what is its resistance at 200C
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