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A line assumed to be infinitely long and of unknown characteristic impedance when connected to a line of characteristic impedance 50 Ω produces a standing wave ratio of value 2 in the 50-Ω line. The same line when connected to a line of characteristic impedance 150Ω produces a standing wave ratio of value 1.5 in the150Ω line. Find the unknown characteristic impedance.
An engineering firm consisting of 3 programmers and 6 circuit engineers. The employees are randomly assign to 3 teams of 3, labeled Group 1, Group 2, and Group 3. a) How many ways are there to assign the 9 employees to Groups 1, 2 & 3
Four equal resistors are wired in series to a 40 V source. - How much does the voltage drop at each resistor?
Imagine a circuit consisted of two DC power sources of 12 volt and 10 volts. The negative terminals of these power sources are wired together. Assume that the positive terminals of these power sources are labeled as A and B respectively.
A DAC is to be used to deliver velocity commands to a motor. The maximum velocity is to be 2,500 rev/min, and the minimum nonzero velocity is to be 1 rev/min. How many bits are required in the DAC? What will the resolution be?
Determine the Laplace transform of f(t) = +5e^-4t + 12sin 3t. If the voltage across a 2 F capacitor is initially zero, what is the instantaneous power if the current is A?
When SCR fires in term of break over? - What conditions of normal and abnormal that will lead to the scr firing?
Consider a VLSI chip with 100,000 gates and 2000 flip flops. A combinational ATPG program produces 500 vectors to fully test thelogic. Find the minimum number of scan test cycles if 20 scanchains are implemented.
A jogger accelerates from rest to 3.75 m/s in 3.58 s. A car accelerates from 16.7 to 31.6 m/s also in 3.58 s. (a) Find the magnitude of the acceleration of the jogger. (b) Determine the magnitude of the acceleration of the car.
What is the advantage of using a bridge rectifier in a power supply as opposed to using a half-wave or a full-wave rectifier? Why is the bridge rectifier more efficient than the others?
120V, 60 Hz source is connected to a distribution line whose resistance, and inductive reactance is 0.001Ohm, j0.002 Ohm, respectively. Single phase, 10HP, 120V, 0.85 pf. motor and 4Kw, 120V heater are connected in parallel.
A certain sine wave has a frequecny of 2.2kHz and an rms value of 25 V. Assuming a given cycle begins (zero crossing) at t=o s, what is the change in voltage from 0.12 ms to 0.20 ms
Problem: A 50kW load operates from a 60 Hz 10 kV line with a power factor of 60% lagging. Determine the capacitance that must be placed in parallel with the load to achieve a 90% lagging power factor.
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