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In spite of the standards and programs in place for US electric infrastructure, such as the INEEL, NERC programs it appears that in early April, 2009, our grid was penetrated (and compromised) by spies of other countries. It appeared that cyber spies left behind software programs such as bots, that could be used in the future to disrupt our system. A. Why is breach of our electric infrastructure by cyberspies such a critical issue? (Respond in less than 5-7 sentences.)
A string of Christmas tree lights consists of ten (2W, 11V) bulbs connected in parallel. a) What current flows in each bulb b) What is the resistance of each bulb
Calculate the lowest 3 energy levels in a quantum well made from InAs, using the infinite potential approximation. Length of the well L = 10 nm.
A walker's cassette tape player uses four AA batteries in series to provide 6 V to the player circuit. The four alkaline battery cells store a total of 200 watt-seconds of energy. If the cassette player is drawing a constant 10 mA from the battery..
Sketch the unit step response of the system below. Show the magnitude of the steady state on the c(t) axis of your response curve and the value of the time constant on the t axis. T(s)=C(s)/R(s)=5/s+2.5
A 240V, short shunt, cumulative compound generator is rated at 100A. The shunt field current is 3A. It has an armature resistance of 50 milli-ohm, a series field resistance of 10 milli-ohm a field diverter resistance of 50 milli-ohm and a rotation..
Given the spectrum X(f) of an analog signal x(t), sketch the spectrum of its sampled version x[n], assuming a sampling rate of 50, 40, and 30 Hz. (a) X(f) = rect(f/40) (b) X(f) = tri(f/20)
If the circuit is driving a100Ω load with a signal generator that has an output impedance of50Ω and an open-circuit output voltage of0.5sin(500t+30o),determine the steady state output voltage.
A transmission line has a resistance of 0.001 pu , and 0.01 p.u reactance. Voltages at the both ends (p and q) of the transmission line are 1.0p.u each. Angle at bus "p" is 45o and the angle at bus " q" is 30o.
A material has a dielectric constant of εr=3.0 andhas an atomic density of 1028 atoms per cubic meter. If only two electrons in the outer orbital shell will distort with anapplied E-field, and both electrons follow the same orbital path asa pair
A transconductance amplifier with Ri = 2 kΩ, Gm = 40 mA/V , and Ro = 20kΩ is fed with a voltage source having a source resistance of 2kΩ and is loaded with a 1kΩ resistance. Find the voltage gain realized (from the source internal voltage to the o..
A Thevenin equivalent can also be determined from measurements made at the pair of terminals of interest. Assume the following measurements were made at the two external terminals a, b of a circuit.
the current through a 1.5 mH inductance is i = 2sin10^(6)t mA. find the voltage v, power p, and stored energy w. Plot them versus 10^(6)t for 0
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