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    Electrical Engineering

    Magnitude of ac input

    Magnitude of ac input. See attached file for full problem description. FIGURE 4(a) shows the circuit of a resistive load fed from a rectifier, via a filter. The filter is designed to remove unwanted a.c. that might be present in the output of the rectifier. To test the performance of the filter, a 50 Hz alternating supply w

    Series Circuits Voltage Calculation

    280) A series circuit has a DC voltage source (56 volts), a resistor (72 ohms), a capacitor (82 farads), and a switch. The capacitor is initially uncharged and the switch closes at t=0. Sketch the exponential current and capacitor voltage: i(t)=Aexp(-t/tau) +B, and Vc(t)=Dexp(-t/tau) +F. Find: A,B,D,F,tau,i(t=tau),i(t=4tau

    Perform many calculations and show the formulas used for each step.

    My school required me to pick a class outside of my field of study in Information Security and halfway through, I realize I mad a poor choice. The first half of the class was Ohms Law and a few other simple formulas and wasn't that bad. See attached for full problem description.

    Saturated and unsaturated synchronous reactance

    The following readings are taken from the results of an open- and a short-circuit test on a 9375-kVA three-phase Y-connected 13,800- V (line-to-line) two-pole 60-Hz turbine generator driven at synchronous speed: _____________________________________________________________ Field current, A

    Electrical Engineering - Memory

    Question 1 (a) A certain cache has an access time of 2 nanoseconds and a hit percentage of 95%. If the main memory access time is 8 nanoseconds, what is the average access time for a read operation? (b) Suppose that the code for a program fits entirely in a cache. There is a very long set of instructions contained in a loop

    transfer function of the the unity gain inverter

    See attached file for full problem description. Consider the unity gain inverter made with an opamp. The opamp is ideal except A(w) = B/jw where B, the unit gain bandwidth of the opamp, is a constant (rps). Find the transfer function H(w)=V0(w)/Vs(w) as a function of A. Substitute the expression for A(w) and find the ma

    Opamp transfer function magnitude and phase

    Consider the circuit. The opamp is ideal. Find the transfer function H(w)=Vo(w)/Vs(w). Find the magnitude and phase of H(w). Plot the magnitude (dB) and phase of H(w) on a Bode plot (vs log w). What type of filter is this? See attached file for full problem description.

    Electrical Engineering - Transmission Lines

    Distance and Voltage. See attached file for full problem description. 1. Given that r = alpha + j*beta show that alpha and beta are given by 2. A transmission line operating at 500 Mrad/s has l = 0.5 uH/m, c = 30.8 pf/m, g = 10^-4 omg-1/m, and r = 25 omg/m. a) calculate values for r, alpha, beta, v, lamda, and z0. b)

    Logic Implementation Methods

    See the attached file. 4.25 (Regular Logic Implementation Methods) You are to implement a combinational multiplier. It has two 2-bit inputs and a 4-bit output. The first 2-bit input is represented by the variables A, B; the second 2-bit input is represented by C, D. The outputs are W X, Y, Z, from the most-significant bit to

    Poles of the Transfer Function

    Skip (a). See attached file for full problem description. Part (b) only: Now assume that R1 = R2 = 2 kohms. Choose the values of C1 and C2 so that the transfer function has the poles indicated in figure (b) above.

    Transfer function of 12.1a

    See attached file for full problem description. Please do not sketch, just derive expression and determine the poles and zeros. 12.1 circuit (a) i) Derive an expression for the transfer function H(s) = V2(s) / V1(s) ii) Determine all of the poles and zeros of the transfer function.

    V and I of the circuit

    Refer to the following circuit: Assume ideal voltage sources. Find a) VBG ; b) I2 See attached file for full problem description. a) V(bg)= -3V; I2= -1A b) V(bg)= -2V; I2= 1A c) V(bg)= 3V; I2= 1A

    To calculate emitter current for a P-N-P transistor.

    A saturated NPN transistor has a base to emitter-applied voltage of 0.6V. The collector to emitter voltage is 0.2V. The collector current is 12 mA. The beta value of the transistor is 30. What is the emitter current? a) 2.5 mA b) Greater than 12 mA c) Cannot be determined by the information provided See attached file for

    Software Engineer

    Sample ideas about a software engineer are generated. See the attached file.

    Recursive Filter Impulse Response

    A recursive filter has the difference equation y[n]=-0.8y[n-1]+0.1y[n-2]+x[n] a. Find the impulse response for the filter? b. How many nonzero terms does the impulse response contain?

    RLC Circuit

    Please answer #3 only. You really don't have to derive the diff eq for the RLC circuit because we already know its of the form: s^2LC+sRC+1 =0, where v(t) = Ae^(st), dv/dt = sAe^(st) ... ** Please see the attached file for the full problem description ** In the above circuit, you may assume that i(0) = 0 and v(0) = 0

    Calculate the Step Response

    Number 2 Only. See attached file for full problem description. In the following circuit, all of the resistors R are identical, i1(t) is the input current and i2(t) is the output current. Calculate the step response of the system. i.e., calculate the output i2(t) when the input is a unit step function. Please express your ans

    Signal Processing Problems

    1. A stationary process X(t) has power spectral density given by (see attached) This process is applied to the input of an ideal bandpass filter with a bandwidth of 2 MHz centered at 50 MHz to produce an output process Y(t). (a) Evaluate the power content of X(t). (b) Evaluate the power spectral density of Y(t). (c) Evaluat

    Transform a low pass filter into a band- pass filter

    See attachment for full problem description Using this low pass filter: E1 is the input and E2 is the output. Using transformation, obtain a Band Pass filter with band center of 2000 rad/sec and bandwidth B of 200 rad/sec. Draw the final circuit will all values.

    Queuing problem: Single server

    (a) Consider a coffee counter with a single server at which tired students arrive according to a Poisson process. Let the mean arrival rate be two students per ten minutes and assume the serving time is exponentially distributed with an average of 180 seconds per student. 1. What is the average queue length? 2. How long does

    Node Voltage Method to Derive Linear Equations

    Problem 6.2 only See attached file for full problem description. In the following circuit, the nodes have been labeled for you and a reference node has been selected. a) Use the node-voltage method to derive a set of linear equations that could be used to solve for the unknown node voltages va, vb, and bc in the above figur

    Proving two signals are orthogonal using MATLAB

    Suppose we had two functions: (See attached) How would you show that these two functions are orthogonal using MATLAB? Also, verify that these two functions are orthogonal analytically: i.e., sketch the functions, their product and find the integral of their product.

    Simplifying a Circuit

    Simplify the following circuit. Line A goes into an INVERTER, then into a NAND Gate, then into an OR Gate, then travels into another NOR Gate. Line B travels into the same NAND Gate, then into the same OR Gate, then into the same NOR Gate. Now Line C goes into another INVERTER, then into an AND Gate, then into the same OR Gate a

    Finding the Energy in a Capacitor and Inductor

    7. What is the energy in joules stored in the capacitor below? The capacitor is shown with 10 volts on each side of it (plus on the left of the capacitor, - on the right), and C = 20 microfarads. 8. What is the energy in joules stored in the inductor shown below? There is a drawing of an inductor with 7 A flowing to the ri

    Inductance of an inductor

    What is the inductance of an inductor given: Air core 100 turns Cross-section area of core is 0.01 square meter Length is 0.1 meters