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The following readings are taken from the result of anopen-end and a short circuit test on a 9375-kVA three-phaseY-connected 13,800-V (line to line) two pole 60 Hz turbinegenerator driven at synchronous speed:Field currentA 169 192Armeture current, short-curcuit test,A 392 446Line Voltage, open-circuitcharacteristic,V 13,000 13,800Line voltage, air gap line,V 15,400 17,500The armature resistance is 0.064 Ω /phase. The armeture leakage reactance is 0.10 per unit on the generator rating as abase. Find(a) the unsaturated value of the synchronous reactance inohms per phase and per unit, (b) the short-circuit ratio, and (c)the saturated reactance in per unit and ohms per phase.
1- Describe how the MOSFET acts as a switch. What could bedone to make the MOSFET ON when the square wave is negative and OFF when the square is positive 2- How is the magnitude of the control voltage determined
If R1 = 220 k Ohms , R2 = 56 k Ohms, Rc = 6.8 k Ohms, RE = 2.2 k Ohms, B= 180, rO = 50 k Ohms, C1 = C2 = 10 uF, CE = 100 uF, and Vcc = 20 V, determine the voltage gain AV.
Two IIR filter coefficients are given below, respectively, IIR system 1: Numerator coefficients: bBP = [0.0201 0.0000 -0.0402 0.0000 0.0201 ]; Denominator coefficients: aBP = [1.0000 -2.1192 2.6952 -1.6924 0.6414 ]; IIR system 2: Numerator coefficien..
Discuss the major difference(s) in operational characteristics for latches vs. flip-flops: compare the timing diagrams for the D latch and D-type positive-edge triggered flip-flop.
How to Combine the following expressions into a single sinusoid and plot both the combined and original expressions in Matlab across 2 periods. a) 2cos(3t)-cos(3t-pi/4) b) sin(2t- pi/4) + 2cos(2t-pi/3) c) cos(t) - sin(t) d) 10cos((pi*t) + pi/3) + ..
A vector field is specified as G=24xyax +12(x^2+2)ay+18z^2az.Given two points ,P(1,2,-1) and Q(-2,1,3),find :(a) G at P ;(b) a unit vector in the direction of G at Q ;(c)a unit vector directed from Q toqard P
A digital communication system employs differentially encoded BPSK modulation scheme with non-coherent (differential) reception. If the Eb/N0 is 8 dB, what is the probability of bit error for the system
A 12-v automobile battery has an output capacity of 100 ampere-hours(Ah) when connected to a head lamp that absorbs 200watts of power. the battery voltage is constant. a) What is the current supplied by the battery
Three single phase transformers are used to form a three-phase transformer bank rated 13.8kV (delta)/120kV (wye). One side of the transformer bank is connected to a 120kV transmission line.
Any causal signal x(t) having a Laplace transform with poles in the open-left s-plane (i.e., not including the j axis) has, as we saw before, a region of convergence that includes the j axis, and as such its Fourier transform can be found from its..
After several hours of operation, the resistance has increased to 170 ohms. Determine the temperature rise and the final temperature of the machine.
A pn junction may be formed by depositing a single crystal film of uniformly doped p-silicon onto a substrate that has been doped n-type. The substrate is 500um thick, and the film is 20um thick. The substrate has a 5 ohm-cm resistivity.
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