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Suppose we have an ac current flowing through a coil wound on an iron core. Name two mechanisms by which energy is converted to heat in the core material. For each, how is the core material selected to minimize the power loss? How does each power loss depend on the frequency of the ac current?
A random signal X can be observed only in the presence of independent addictive noise N. The observed quantity is Y = X + N.The joint probability density function of X and Y is f(x,y) = K exp[-(x2 + y2 + 4xy)] all x and y
let X(s) be the Laplace Transform of signals that are bounded (i.e. the poles of X(s) are on the left-hand s-plane). Find lim [as t goes to infinity)] y(t). Determine if the system is BIBO stable. If not, determine what makes the system unstable.
If 20 MHz of total spectrum is allocated for a duplex wireless cellular system and each simplex channel has 25 KHz RF bandwidth, find: (a) the number of duplex channels (b) the total number of channels per cell site, if N = 4 cell reuse is used.
Calculate the impedance to neutral of this line. Calculate the line charging current in A/phase if the line is 100 km long and is operated at line-line voltage of 230 kV (8.565 pF/m, j3.23 micro-Siemens/km, 42.9 A/phase)
Use MATLAB to compute the inverse Laplace transform of X(s)=(s^2+2s+1)/(s(s+1)(s^2+10s+50)) and determine the value of x(t) in the steady state. How would you be able to obtain this value without computing the inverse? Explain.
the following assignment needs to be completed using only the information provided in the section. project 8.3 on
Your selection shall be based on a life cycle cost analysis (LCCA) including PW and EAC. Be sure to show complete functional notation with the correct compound interest factors for each option
Consider alternative conditioning circuits and processing and select the appropriate options and implement design-Characterize and model the sensor, design conditioning circuits and processing.
A constant current I is flowing in a semi infinite loop. Find magnetic field intensity at the origin: H(0,0,0). Use magnetic field intenisty for a piece of wire.
Discuss the attributes of professional and technical presentations. What are some of the characteristics that may differentiate these types of presentations from others.
Design an inverting op-amp circuit for which the gain is -5V/V and the total resistance used is 120kΩ
1. Find cross-correlation sequence for x and y. 2. Find autocorrelation sequence for x and y. 3. Find the convolution sequence z(n) for x and y. 4. Plot above three sequences using MATLAB and verify your hand calculations for those sequences
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