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the voltage across an element is 12e^-2t V. the current entering the positive terminal of the element is 2e^-2t A. Find the energy absorbed by the element in 1.5 seconds starting from t =0.
A random variable X has a variance of 9 and a statistically independent random variable Y has a variance of 25. Their sum is another random variable Z=X+Y. Without assuming that either random variable has a zero mean
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.
Write a program to create a time delay of approximately 100 seconds by using program loops, assuming that the bus frequency is 24Mhz. What is the approximated delay. How can you make it more accurate.
(Probability of negative lifetime is negligible) Lifetime of chip 2 is also a Gaussian RV with mean 22,000 and standard deviation 1000 hours. Which is preferred if the target lifetime of the system is (i) 20,000 hours and (ii) 24,000 hours
A digital communications system is being designed with the goal of transmitting 32 kbits/s over a channel having a bandwidth of 8 kHz. Determine (a) the number of encoding levels required and (b) the minimum signal-to-noise ratio required in the c..
Pulse Generator, Using one 555 timer, design a pulse generator that will have the following continuously variable ranges
A separately excited 300V DC motor has an armature resistance of 1ohm and a field resistance of 100 ohm. The field Voltage is 200V. The no load speed is 1200 rpm and no load armature current 2A
A 150kVA, 2080/208V, 60Hz, Y/Y connected, three-phase, step-down transformer consists of three identical single-phase transformers. Each transformer has the following parameter values: Rl = 0.45-ohm, Xl = 2.2-ohm , R2 = 4.5m-ohm
Write a program that asks a user to input (one at a time) the four numbers to fill a 2x2 matrix. For each number entered, make sure the user knows which number is being entered.
A ‘c-core' inductor has a total air-gap length of 3 mm and a cross-sectional area of 100 cm2. Two coils are wound on the core - one of 500-turns and another of 250-turns. Assuming the iron reluctance, fringing flux and leakage flux to be negligibl..
For w=w0, compute the ratio of the amplitude of the voltage source over the amplitude of the voltage across the resistor,Q=|U|/V0, when V0=sqrt(2), C=8.2microF, L=7mH, and R=1.5kOhms. Is this ratio larger or smaller than one
A negative feedback amplifier has a close-loop gain Af=100 and an open-loop gain A=105. What is the feedback factor If a manufacturing error results in a reduction of A to 103, what close-loop gain results
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