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Electrical Engineering

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

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)

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

Emitter current of a NPN 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

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

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

Net capacitance of a capacitor

1. What is the net capacitance of a capacitor given: Relative permitivity is 500 The area is one square meter The distance between the plates is 0.001 meters

Converting Complex Voltage to Polar Coordinates

I have a complex voltage = 10-j20. I am trying to convert it to polar coordinates with my Ti 89 but I keep getting my answers in arc tan. Can someone show me a way to restrict this answer within -pi and pi so I don't get any arc tan in my conversion.

Assembly Language

7. Assume that these registers contain the following: A = F0, B = 56, and R1 = 90. Perform the following operations. Indicate the result and the register where it is stored. Note: The operations are independent of each other. (a) ANL A, #45H (b) ORL A, B (c) XRL A, #76H (d) ANL A, R1 (e) XRL A, R1 (f) ORL A, R1 (g

Root Locus Analysis & Design

Root Locus Analysis & Design. See attached file for full problem description. 1) Draw the root locus of L (attached). of for positive and negative gain on graph paper. Find (graphically) the gain, k, to get l = 0.5 for the dominant poles and specify the corresponding corner frequency. 2) Draw the root locus of L (attach

System Equations in Matrix Form

A system is defined by the equations: x1 = -3x1 + 2x2 + x3 + 2u1 + u2 x2 = 3x1 - 2x2 + x3 + u1 x3 = -4x2 - x3 + u1 y1 = 5x1 - 3x2 + x3 + u1 y2 = x1 + x2 + u1 + u2 Write the equations in standard matrix form and identify the A, B, C, and D matrices Draw a simulation (block) diagram.

Truth table for circuit diagram

1. a) Draw the truth table for the circuit shown below. b) Show an extrusion of this circuit that realizes a DFF. (see attached file for diagram)

Half-wave controlled rectifier circuit (Power Electronics)

I've attached jpegs that show the circuits that I'm working with. My problem is that I don't know how to find the values of Ct and Rt for a specific firing angle. What formulas are needed? Is the calculation affected by the fact that there are two different loads (see circuits 1 and 2 jpegs)? What process must I go through to fi

One Rung Relay Ladder Diagram

It is desired to control the coil of a relay CR4 using relay contacts CR1, CR2, and CR3. CR4 is to be ON whenever a majority of CR1, CR2, and CR3 are ON (i.e. any two or all three). Draw a one-rung relay ladder diagram that will produce the logical operation.

Controller Design Using Bode Plots

Please explain design steps using bode plots and different stages of Inverse Nichols Chart. See attached file for full problem description.

For a stable, physical system, which of the following is true?

For a stable, physical system, which of the following is true? a. All the elements of the first column of the Routh stability table have the same sign. b. The elements of the first column of the Routh stability table can have either plus or minus signs. c. Neither of these. See attached file for full problem description.