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A 2000kW synchronous motor operates at a three - phase line-to-line voltage of 4kV. It has a synchronous reactance of 4 ohms per phase. Calculate
a) The nominal full load current of the machine when the excitation voltage E0 ( line - to-line) is 4kV.
b) The short- citcuit current when the excitation voltage E0 ( line-to-line) is 4kV.
Why Can Discrete-Time FIR Digital Filters be a Linear Phase, Why can discrete-time FIR digital filters be made exactly linear phase, whereas IIR digital filters cannot?
A dc machine is rated 5 hp with V_f = 240 V, V_a = 240 V, r_a = 0.63 ohms, and L_AF = 1.8 H. At rated condtions w_r = 127.7 rads/s and the total resistance of the field circuit is 240 ohms. a) Calculate the rated armature current.
A single-loop negative feedback system has the loop transfer equation: L(s)=Gc(s)G(s)=K(s+2)^2 / (s(s^2+1)(s+8)) a. Sketch the root locus for 0 K infinity to indicate the significant features of the locus. b. Determine the range of the gain K for whi..
You deposit 10% of your annual salary at the each of each year in a retirement account. F= Future worth A1= first annual deposit n=number of years g=geometric gradient F=A1(1-(1+g)^n(1+i)^-n/(i-g))(1+i)^n use Matlab to graph the function.
Briefly discuss the impact of electron energy, electron current and target on the Bremsstrahlung generated.
A silicon semiconductor resistor is in the shape of a rectangular bar with a cross sectional area of 1x10^-6 cm^2 a length of 0.1 cm and is doped with a donor concentration of 5x10^16 cm^-3.
Sketch a block diagram of the arrangement and calculate suitable values of pad resistance if both the amplifier and the line have a characteristic impedance of 600 Ohm.
A battery is charged. The relationship between the charging current, i amperes and the time, t hours passed, is given by the formula:
Control Systems and Laplace Transformations, What is the step response of a system whose transfer function has a zero at -1, a pole at -2 and a gain factor of 2?
Describe the charge diffusion and drift in a PN junction, without and then with an applied voltage
Using many resistors and the DMM, try to determine what digits each colour band represents. Briefly explain your method and your findings in the space below.
Implement a high-speed multiplier which will multiply two 2-bit binary numbers (B1B0 and C1C0) using a 16X4 PROM (lookup table implementation). List the content of all the memory locations in the PROM and describe the operation.
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