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A capacitor bank is required that can be charged to 5 kV and store at least 250 K of energy. Design a series/parallel combination that meets the voltage and energy requirements using 20-μF capacitors each rated at 2 kV max.
in investigating the ideal gas law experiments are to be run at four different pressure and three different temperatures . A) How many exprimental conditions are to be studies B) If each experment is replicated 5 times how many expriments will be con..
An electronic circuit board with lambda(t) = 0.00021 h^-1 is replaced on failure. What is the probability that the third failure will occur by 10000h ( hint: if there were 4 0r more failures by 10000h, that also means there were 3 failures by 1000..
the rms voltage of a balanced 3 phase Y connected source is 110 volts at 60Hz. it is connected to a balanced Y Load by 3 distribution lines with an impedence on each line z=1+j2. the load impedence is z=19=j28 per phase.
determine the current drawn from a 3 phase 220 V line by a 3 phase 15kW motor operating at half load, 85% efficiency and .8 pf lagging. Find the values of real and reactive power drawn from the line.
A) the current decreases by a factor of 1000 in .2s B) the time required for the current drop to half of its intial value is .1s less than the time required for it to drop one-quarter of its intial value.
A small circular parabolic reflector, often referred to as dish, is now being advertised as a TV antenna for direct broadcast. Assuming the diameter of the antenna is 1 meter, the frequency of operation is 3 GHz, and its aperture efficiency is 68%
Identify and describe three different ways to manufacture resistors. These variations can be "form factor" or the technique used to establish the resistance. Provide an example of a resistor de-rating curve from a manufacturer
A 25 MVA, three phase, 13.5kV, Y-connected, two pole, 60 Hz synchronous generator was tested by the open circuit test and short circuit test and tabulated in table 1. If the armature resistance is 0.24 ohms per phase
Convert the designed prototype filter to highpass filter with cutoff frequency f_C=10,000 Hz, with 30 db attenuation at f_S=1000 Hz. Determine the transfer function of the filter.
a bar of n-type germanium and we place an E field going to the right across it and create a pulse of excess minority carriers (holes) in the center of the bar at time t=0. In other words we are performing the Haynes Shockley Experiment on the bar
An Aluminum wire with a square cross section 2mm on a side is carrying a current of 1.5amps. Aluminum has a resistivity of 2.69*10^-6 ohm-cm and an atomic volume of 10cc/mol. Assuming aluminum has three free electrons per atom
Let x[n] be a signal and let y[n]=Σx[m], where m is from -∞ to n. If Y(jΩ) =cos2Ω, x[n] consists of exactly four impulses. What are their numerical strength and locations
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