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Sketch the theoretical torque vs. speed characteristics for a series, shunt, and compound connected DC motor. Describe what will happen if a series motor is run under no load conditions. descr
A volume charge density of K Coulombs per cubic meter resides uniformly within the material of a long cylindrical shell whose inner radius is 1 m and whose outer radius is 3 m. Find D and E in all
A source X produces symbols A, B, C, D, and E with probabilities 0.5, 0.25, 0.125, 0.0625 and 0.0625 (a) Find the information content of X. (b) Give a fixed length code for X. Compute its efficiency
A charge density of ohm Coulombs per square meter is uniformly distributed over a thin and very long cylindrical shell of radius a. You want to know the electric flux density field D and the electri
Suppose that the source charges of the two previous problems are present together. The potential at infinity is defined to be 0. a. Is the potential at the point (0.5, 0.5, 0.5) positive, negative,
A ball of radius 1 meter centered at the origin has uniformly distributed over its volume a positive charge Q. a. In moving a positive test charge from the point (x, y, z)= (2, 2, 2) to the point (4
A 3-phase, 2300 V, 60 Hz, 12-pole, Y-connected synchronous motor has 4.5 ? per phase synchronous reactance and negligible stator winding resistance. The motor is connected to an infinite bus and dra
A 3-phase, 20 kVA, 208 V, 4-pole star-connected synchronous generator has a synchronous reactance of Xs = 1.5 ohm per phase. The resistance of the stator winding is negligible. The machine is connec
Design Problem- the circuit must have the following transfer function: Tv(s)=+- (s+125)(s+500)/(s+250)(s+1000) a)design the circuit using two Omp-amps B) design a circuit using only one omp-amp c) d
Consider an n-Si with doping of 9*10^16cm^-3. In a certain region of this sample, there is an electric field of 1000V/cm. Estimate the electron and hole drift velocity and the total drift current de
Compute the equilibrium carrier concentrations and the position of the Fermi level with respect to the conduction band edge for a uniformly doped Si region with N_D=1*10^16 cm^-3 and N_A = 1*10^17 c
Design a class - A transformer-coupled emitter-follower amplifier to deliver 10 W to an 8 Ohm speaker. The ambient temp is 25 C and the maximum junction temp is Tj max = 150 C. assume the thermal re
A family selects two phones from a box containing cellphones: four are Nokia, marked N1, N2, N3, and N4. The other three are Samsung, marked S1, S2, and S3. Two phones are picked randomly in success
The binary-coded-decimal (BCD) format uses 4 bits to represent 10 decimal digits. For example, 259 is represented as "0010 0101 1001" in BCD format. A BCD incrementor adds 1 to a number in BCD forma
Three Single-Phase two-winding transformers, each rated 25 MVA, 38.1/3.81 kV, are connected to form a three-phase Wye-Delta bank with a balanced Y-connected resistive load of 0.6 ohms per phase on t
DC-DC converter. You have 10 capacitors, each 1F. If you charge them in parallel from a 5V power supply, and then disconnect them and reconnect them in series: a. What is the equivalent capacitance
In a vessel with a volume 3 m3 you put 0.03 m3 of liquid water and 2.97 m3 of water vapor so that the pressure is 101.33 kPa. Then you heat the system until all liquid water just evaporates. What is
A uniform plane wave propogates in the positive z direction with a frequency of 20 MHz. A probe is at z=0 m measuring the phase to 98 degrees and another probe at z= 2 m measures the phase to be -15
Design limiter circuits using only diodes and 10-k ohm resistors to provide an output signal limited to the range: (a) -0.7V and above (b) -2.1V and above (c) ±1.4V Assume that each diode has
A BJT is operated in a 50ohm circuit 1.5Ghz. FOr the bias conditions of Collector Current - 4mA and Collector-Emittor Voltage = 10V. The manufacturer provides the S-parameters in magnitude and
What is the major difference between a bipolar and a unipolar device Which of the transistor currents is always the largest Which is always the smallest? Which two currents are relatively close in
Calculate: a. The rated primary and secondary currents b. The secondary voltage if it is connected at full load of 2000 kW c. The voltage regulation from no-load to full load. Voltage regulation is
Design a synchronous sequential circuit with one input line and one output line that recognizes the input string x = 1111. The circuit is also required to recognize overlapping sequence such that if
A bar phantom is imaged by an LSI system which is modeled as an ideal moving average system. The PSF of the system is h(x,y) = rect(x/delta, y/delta) (a) If bar separation of the bar phantom is f wh
Design a combinational circuit with four inputs, x,y,w, and z, and four outputs: A, B, C, and D. When the binary input value in decimal is 3,8,12 or 15, the binary output value is one less than the