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Assume the system shown in the Fig. is balanced, Rw = 0, Van = 208 angle 0 degree V, and positive phase sequence applies. calculate all phase and line currents, and all phase and line voltages, if Zp is equal to a) 1K ohms b) 100 + j48 ohm
Write down the expression for the frequency-dependent open-loop gain of an operational amplifier. Sketch the magnitude of the open-loop gain of an operational amplifier as a function of frequency. Explain what is meant by a `single-lag' response o..
A 120 V separately excited DC Motor is operated at a fixed field current. It has an armature resistance Ra = 10 ohms, and a machine constant K = 0.1 V/rpm. The armature current is 0.5 amps with no load, and 3.0 amps at full load.
A design for high pass filter with butterworth characteristic is needed. Filter specification rewquire a cut-off frequency of 9 kHz for a sampling rate of 44 kHz, and a stop band attenuation of 40dB
A certain transducer is modeled with a source Vs and series resistance Rs. The voltage at its terminals is measured with a DVM having internal resistance Ri = 100 Mega ohms and is found to be 12.5 mV; adding a 5 Mega Ohms resistance in parallel
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) The line-to-neutral voltage per phase.
suppose the one dimensional field. A-=Kx ax- exist in a region. illustrate the validity of Gaussian theorem by evaluating its volume and surface integral inside and on the rectangular parallelelpiped bounded by the surfaces:
You have a 10 nH inductor. What value of capacitor should you put in series with the inductor to achieve an impedance of Z=j50 ohm at f=1.0 GHz
Bob enters a pizza shop and notices there are three different sizes of pizzas available. Sizes are given as the diameter of the pizza in inches. The cost of a pizza is based on the size. Bob would like to know which size of pizza has the lowest co..
A three-phase, 60Hz, wye-connected synchronous generator has balanced line-to-line voltages of 480V at its terminals. The generator is supplying power to two balanced and delta connected, three-phase loads. the first load is made up
1) Determine the resistance range for resistors with the following color codes: a. Red-Orange-Orange-Silver b. Gray-Red-Red-Gold c. Yellow-Purple-Yellow-Gold 2) Determine the color code for the f..
The output response for a system is given as Vo(t) = A(1-e^-at)sin(ωt). Is this a proper representation for an output response given that it contains a sinusoidal term? Fully explain your answer.
A generator is rated at 500 MVA (three phase) and 22 kV (line-to-line). Its Y-connected windings have a reactance of 1.1 per unit. Find the ohmic value of the reactance of the windings. What is the per unit value if we change the base to 200 MVA a..
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