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Q. Three single-phase 100-kVA, 2400:240-V, 60-Hz transformers (each ofwhich has an equivalent series impedance of 0.045+j0.16 referred to its low-voltage side) are connected to form a three phase, 4160:240-V transformer bank, which in turn is connected to a three-phase feeder with an impedance of 0.5 + j1.5 /phase. When the three-phase transformer bank delivers 250 kWat 240Vand 0.866 lagging power factor, determine:
(a) The transformer winding currents.
(b) The sending-end voltage (line to line) at the source.
Q. Basic elements of a digital communication system? Figure illustrates the basic elements of a digital communication system. For each function in the transmitting station, th
Explain the NAND Gates - Microprocessor? The NAND GATE is a AND gate with the output inverted. Consequently the outputs of a NAND gate would be the opposites of the outputs of a A
Q. What is the significance of giving a negative voltage to the gate higher than that of the source? This is done to reach the saturation at a lower of level of V DS . The re
Variation of Energy Bands with Alloy Composition The band structures of III-V ternary and quaternary compounds modifies as their composition is varied. There
A selection form an application's menu, or a command typed in by the user, like at a DOS prompt or at the Run dialog box in Windows.
.coments on the limitation of the superposition theorem
The present window that is being used.
NPN BJT with forward-biased: An NPN transistor can be referred as two diodes along with a shared anode. In common operation, the base-emitter junction is forward biased and th
Hexadecimal Number System Similar to octal number hexadecimal number system is also used to represent long binary numbers in smaller form. In microprocessor we use hexad
Q. A particular BJT has a nominal value of α 0.99. Calculate the nominal β.If α can easily change ±1%, compute the percentage changes that can occur in β.
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