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A uniformly doped n-type silicon bar doped ND =1016/cm3 of length L is illuminated to create1011/cm3 excess electron-hole pairs at x=0.The illumination wavelength does not allow the light to penetrateinto the interior (x>0) of the bar. An ohmic contract is formedat x=L that serves as a perfect sink for excess carries(i.e. excesscarrier concentration =0 at x=L) Assume( τp=10-6 sec τn=10-9sec Dp=34cm2/sec Dn =25cm2/sec and T = 300K)
Develop mathematical expressions and plot the electron and holeconcentrations for all x.
The value of the capacitor from the high-voltage terminal to the tap point is 0.005µF. The tap point voltage is 4 kV. What is the value of the capacitor connected between the tap point and the ground terminal. What is the value of the tuning induc..
The following 4 differential equations describe mass spring systems. Identify each system as either undamped, overdamped, underdamped, or critically damped (Justify your answer). Determine the angular frequency and period for the undamped
A 250ft^2 shell and tube heat exchanger was purchased fo $13,500 in 1994 when the index value was 830. Estimate the cost of a 150 ft^2 shell and tube heat exchanger in 2010 when the index calue is 1,029 and the appropriate factor is 0.6.
A mealy sequential circuit has one input (x) and one output (z). z can be 1 when the fourth, eighth, twelfth, etc. inputs are present, and z=1 if and only if the most recent input combined with the preceding three inputs was not BCD encoding of a ..
(a) Calculate the length of the blades of a 1 MW wind turbine. Assume the air density is 1.0 kg/m^3, average wind speed is 15 m/sec, and overall efficiency is 25%. (b) An ideal solar cell is operating at30°C. The reverse saturation curren is0.15 mi..
b. To maintain one per unit voltage at rated load, find the per unit generator voltage needed. c. Find load current in amps, current through the transmission line in amps, generator current in amps, and the genertor voltage in volts.
Digital Communications, Order the following modulation types in terms of spectral efficiency (best to worse) and explain
Determine the conductor size for each motor tap, the motor controller size, overload rating, motor and controller disconnect rating, time-delay fuse rating, and motor branch circuit conductor size.
Given the vector field F(x,y,z) = 2zi + (x+y)j - yzk. S (oriented upward) is the part of the plane x + y + z = 1 above the triangular region with vertices (0,0,0), (1,0,0) and (0,1,0) and C is the boundary of S with positive (counterclockwise) o..
A microcontroller manufacturer, Agduino, offers a single product which is produced at two different plants. The first plant located in college station produces 2/3 of the microcontrollers. The remaining microcontrollers come from Austin.
Five periods of the signal s(t)=sin(2500pi*t) are sampled at a sampling frequency of 4000 Hz. a. Does this sampling frequency meet the Nyquist requirement for the signal? b. How many samples are collected
From a high-level perspective, what is the major difference between the LM324 and the LF347. Which of the performance characteristics are significantly different because of this.
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