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A designer has a supply of diodes for which current of 2mA flows at 0.7 V. Using a 1 mA current source, the designer wishes to create a reference voltage of 1.25 V. Suggest a combination of series and parallel diodes that will do the job as well as possible. How many diodes are needed? What voltage is actually achieved?
To put this number into perspective, on June 20, 2002 the US national debt was $6.1e12, which is about $21,000 for each of the 288 million US citizens. What number when multiplied by the US national debt equals the cost to toast the bread.
Design a high-pass op amp filter with a high-frequency gain of -100 and a cutoff frequency of 1kHz. Resistors with values of 1kohm, 10khom, and 100kohm are available. Determine the capacitance and resistance values of the filter.
Let S measure the time-dependent strength of a material under test and So is the initial strength as measured at the beginning of test. Prior tests and evaluations have suggested that the following stress-time relationship appears to work.
Alice passes through four traffic lights on her way to work, and each light is equally likely to be green or red, independent of the others. Let X be the number of red lights that Alice encounters. Let A be the event that the first light is red.
In a motor control system, one master stop pushbutton (Stop) is available for stopping the operation at any time. If the temperature switch (TSW) is closed, pressing the red pushbutton (RedPB) will turn on both motors M1 and M2.
For a face centered cubic, the volume of a conventional unit cell is a^3 Find the volume of a fcc primitive unit cell with three basis vectors: (0,0,0 --> a/2,0,a/2) and (0,0,0 --> a/2,a/2,0), and (0,0,0 --> 0,a/2,a/2)
For the function G(x) = x + 32 / x^2 A) Determine the relative minimum of G B) Describe the concavity for all values of x except zero
A given application is reading and writing 32KByte files on a disk that has a data transfer rate of 150MByte/s. Measurements have shown that this disk incurs an average seek time of 6.7 msec and needs an average of 11.08 msec to complete a read or..
induction cooking based on power electronic is estimated to be 80 percent efficient compared to 55 percent for conventional electric cooking . if an average home consumes 2 kw-hrs daily using conventional electric cooking.
calculate the losses in the transformer under these conditions. losses and efficiency when the transformer delivers its rated power to a load having a power factor of 90%
The problem is a series circuit with the AC voltage of 50V at a phase angle of 0 degrees. Also the resistor has a resistance of 3 ohms. Xc = 5 ohms, X(L) = 9 ohms. All three components are in series. The frequency is 60 Hz.
An interconnect 60-Hz power system consist of one area with three turbine genrator units rated 1000,750,500 MVA respectively. The regulation constant of each unit is same R=0.05 per unit based on its own rating.
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