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1. The value of R^2=0.100 R2=0.100 corresponds to a ______________ effect size A. cannot be determined B. large C. small D. medium

Consider an LTI system for which the system function H(s) has the pole-zero pattern shown in Figure -X-X- -2 -1 Im XO +1 +2 Re (a) Indicate all possible ROCs that can be associated with this pole-zero pattern. (b) For each ROC identified in part (a), specify whether the associated system is stable and/or causal.

Q1 A cabled communication system is required for connecting a small data centre. This data centre will transfer approximately 1Tb of data an hour from a computer located 200m away within the same building. (a) Name three different types of cabled transmission lines and indicate their appropriateness for this challenge. (b) Choose one of these three options and explain in your own opinion why this particular cabled transmission system is the most appropriate choice. (c) Outline the components needed to meet these data transmission requirements.

Problem 3

Explain the role of wide-area monitoring systems (WAMS) in enhancing power grid stability and security.

Question 7

Consider the mobile communication system shown in Figure 2. Assume the tower is providing mobile communication to a cellphone user. The height of the base station (BS) tower is 100m. Assume the elevation of the cellphone from the ground is 2 m, which is insignificant and can be ignored. Assume the smartphone needs at least -50dBm of received power from the base station in order to be able to communicate. Assume the transmit power at the base station is 40dBm, the transmitter and receiver gains are 5 and 2, respectively. The cell phone operates at 1900MHz carrier frequency. B5 h 100m BS_MS_D Figure 2 a) Calculate how far you can be away from the base station (i.e., BS_MS_D distance) and still be within communication range of the base station, i.e., be able to receive the signal sent from the BS. You may use link budget analysis discussed in class. What should be the transmit power of the BS to allow the range R = 21 and still be able to communicate with the BS? Calculate the Path Loss…

4.a. The installation of motor controllers and combination load equipment is not permitted if the short-circuitcurrent rating of the equipment isA. equal to the available short-circuit current at the site of installation.B. not found on either of the nameplates.C. more than the available short-circuit current at the site of installation.D. less than the available short-circuit current at the site of installation. 4.b. In a(n) ___ bend, the conductor does not enter or leave an enclosure through the wall opposite itsterminals.a. Vb. Sc. L

Voltages are represented by: e, = 20sinwt e2 = 30sin (wt ez = 40cos (wt +") e4 = -15sin wt es = -25cos (wt – ") Find the resultant instantaneous voltage using: (a) (b) (c) trigonometric identities component method complex method

18. Why are signals that are in quadrature said to be orthogonal?A. They do not interfere with each other.B. They split into two paths. C. They can shift to one of two predetermined phase states.4D. The amount of data that can be transmitted over time

(A) Consider a communication system where the number of successful transsions out of 10 trials follows a binomial distribution. The success probability for each triat is 0,95, Let X be the random variable representing the number of successful transmissions. -Sketch the cumulative distribution function (CDF) of the distribution. 2- Find Skewness coefficients and check if the distribution is symmetrical or skewed to the right or left. 3- Find kurtosis coefficients, Check if the distribution is mesokurtic, leptokurtic or platykurtic. 4- Find the probability of getting at most eigh. successful transmissions. 5- Find the probability P(20 with a mean 2-1 calculate the probability that the noise is greater than 3 units.

How does a wide-area monitoring system (WAMS) contribute to the stability and control of large-scale power grids?