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ELECTRICAL ENGINEERING PRINCIPLES
1) The switch in Fig. 1 has been in position A for a long time. At t = 0, the switch moves to B. Determine v(t) for t > 0 and calculate its value at t = 1 s and 4 s.
2) At t = 0, switch 1 in Fig. 2 is closed, and switch 2 is closed 4 s later. Find i(t) for t > 0. Calculate i for t =2 s and t = 5 s.
3) A certain electronic power supply requires 25 W of input power. It can produce an output power of 20 W. What is its efficiency, and what is the power loss?
According to the neoclassical growth model, how would each of the following affect consumption per worker in the long run (that is, in the steady state)?Explain. The destruction of a portion of the country's capital stock in a war.
List a state table for JK flip-flop, using Q as the present and next state and J and K as inputs. design the sequential circuit specified by the state table.
Determine which waveform in each pair is lagging: a) 6 cos(100πt-1000) and -6 sin (2π60t+1300)b) cos(10t-1000) and - cos(t-1000) c) cos (50πt - 1000) + cos (50πt - 200) and 9 cos (100πt - 200)
Discuss why the primary of a power transformer would have excessive current if the secondary were short-circuited. Why would there be no voltage across the secondary if the primary is open
The controlled variable in a closed-loop system is the direction of a robot arm. Initially it is at 50o; then it is commanded to go to 15o. When the error is 10o for the first time, what is direction of the robot arm
An Electric Range top burner control adjusts the duty cycle of the current and voltage supplied to surface heating element as a function of the control's dial setting. The range controller operates from a 240 VRMS single phase supply
A 20-MVA, 12.2 kV, 0.8-PF lagging , Y connected synchronous generator has a negligible resistance and syncronous reactance of 1.1 per unit. The generator is connected in parallel with a 60-Hz, 12.2-kV infinite bus that is capable of supplying or c..
There are two charge distributions: one in a infinite plane of charge in x=-2 with a surface charge density of 3mC/m2, abd a infinite line of charge with a linear charge density of -3mC/m that goes through the points A(0, 0, 3m) and B(0, 3m, 0).
An empty capacitor has a capacitance of 6.44 µF and is connected to a 12-V battery. A dielectric material (X = 4.5) is inserted between the plates of this capacitor. What is the magnitude of the surface charge on the dielectric
can you solve the problems in the attached file?? its feedback control system course and the deadline 3182014
Derive an iterative formula for finding the roots of cos(x) = x with Newton's method. Starting with an initial guess of x = 5 radians, determine the estimate of the root after five iterations. How many iterations are needed to get f
A stabilization circuit has a stability factor of 0.04 and an internal resistance of 5 Ω. The unstabilized voltage can vary between 75 and 100 V, and the load current can vary from 40 to 80 mA. Determine the maximum and minimum values for the stabil..
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