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The all-aluminum conductor (AAC) identified by the code word Bluebell is composed of 37 strands, each having a diameter of 0.1672 in. Tab les of characteristics of AACs list an area of 1 ,033,500 emil for this conductor (1 emil = (π/4) X 10-6 in2). Are these values consistent with each other? Find the overall area of the strands in square millimeters.
A three-phase, 318.75-kVA, 2300-V alternator has an armature resistance of 0.35 /phase and a synchronous reactance of 1.2 /phase. Determine the no-load line-to-line generated voltage and the voltage regulation
In most situations it is also desirable to send information from the process to be controlled--in this case the 500-gallon tank--to a central station for processing and storage. This information can be transmitted and processed in different ways.
Self Excited DC generator in a short-shunt cumulative compound configuration with variable output control to the load. Assume a constant speed prime mover.
Problem: A load has 10 A current at a lagging power factor of 50%. Voltage is 120 V, and frequency is 60Hz. What size capacitor must be used to bring power factor to 90%?
The following tests are performed on a single phase transformer rated 30/6.3 KV , 10 MVA , 50 HZ i- Short circuit test with L.V side short circuited and measurement made on H.V side I = I full load , V = 2700 V , P 80 KW
We have a six-pole, 440-V-rms, 60-Hz delta connected synchronous motor operating with a constant developed power of 20 h p, unity power factor, and a torque angle of 10°. Then, the field current is reduced such that Br is reduced in magnitude by 2..
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
a proton moves through a region containing a uniform electric field given by E=50.0 v/m and a uniform magnetic field B=(0.200+.300+.400)T. Determine the acceleration of the proton when it has a velocity v=10.0m/s
A ¼ watt resistor has a resistance of 3.2KW what is the maximum current that the resistor can handle. If the wattage rating is doubled, will the maximum current double.
For the system represented by the following difference equation y[n] = 0.5x[n] + 0.5x[n - 1] find: (a) the transfer function H(z) of the system. (b) the frequency response H(e^jw) of the system.
The electron distribution in the conduction band peaks at energies close to the conduction band edge. Using the Boltzmann approximation, find the energy in the conduction band (as a function of temperature) at which the electron density peaks
Why should we spinphotoresist at the flat part of the spin curve?
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