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The following tests are performed on a single phase transformer rated 30/6.3 KV , 10 MVA , 50 HZi- Short circuit test with L.V side short circuited and measurement made on H.V sideI = I full load , V = 2700 V , P 80 KWii- No-load test with the H.V open circuitedV= 6.3 KV , I = 22.7 A , P= 100 KW
a) Calculate the equivalent resistance , reactance and impedanceb) What is the secondary voltage if the transformer is loaded with full load current at 0.8 P.f lagging
A particular signal source produces an output of 30 mV when loaded by a 100-k ohm resistor and 10 mV when loaded by a 10-k ohm resistor. calculate the thevenin voltage, Norton current, and source resistance.
Inflation in years 1-5 equals 3.1 percent, 2.2 percent, 1.6 percent, 1.3 percent, and 1.1 percent, respectively.
Design an elevator controller for a simple two-floor elevator. On the 1st floor, there is only an up button, and on the 2nd floor, there is only a down button. Within the elevator, there are two buttons: door open and door close.
Where (in the sequence of subsystems within a communication system) does the line encoder used? Draw a block diagram. Write a sentence or two on what is in the other boxes. What are the two broad parameters associated with an efficient line encoder..
When a HIGH is on the output of the decoding circuit below, what is the binary code appearing on the inputs?
if a 1mA movement has an internal resistance of 43 ohms, calculate the shunt resistance required to increase its range to 50mA and also 300mA.
Compute the power absorbed by an element in a circuit, but for a simple sinusoidal current i = sin(2πt/T) where T = 1 s.
Derive a system diagram for a frequency-modulated transmitter and explain the function of each stage and detect and reproduce (demodulate) the message signal. Measure the frequency of the detected signal and compare that with the frequency of the m..
Design an operational amplifier cicuit that has the following specifications: Gain=-3; Input impedence>20 kohm You have unlimited number of resistors of values 1,2,5, and 10 kohms and LM741 op amps. Input impedance of LM741 op amp is 3Mohm.
After 10 min the process is stopped, and fresh water is poured into the tank at a rate of 8 gal/min, with the mixture again leaving at the same rate. Find the amount of salt in the tank at the end of an additional 10 min.
An amplifier with a power gain of 3dB is to be characterized. The test apparatus provides a SNR of 20dB at the input and measures a SNR of 15dB at the output. Find the amplifier's NF. Specifications for (2), (3), (4) and (5).
An Ericson cycle operates on 0.227 kg of nitrogen from 650oC to 92oC. If 68kJ of heat is added during the isothermal expansion process, determine a) the overall expansion ratio; b) the heat transferred to the regenerator
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