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A Si sample is doped with 1014 boron atoms per cm3.(a) What is type of semiconductor is it in terms of carrier type? What are the minority and majority carriers?(b) What are the carrier concentrations in the Si sample at 300K?(c) What are the carrier concentrations at 470K?
An LVDT is used in an accelerometer to measure seismic-mass displacement. The LvDT and signal-conditioning output is 0.31 mV/mm with a +/-2 cm maximum core displacement. The spring constant is 240 N/m, and the core mass is 0.05 kg.
A signal has a fundamental frequency of 1000 Hz. What is its period? Assume the signal has a peak amplitude of 1 Volt and that the instantaneous power is equal to the square of the voltage, then compute the average power of the fundamental frequen..
A synchronous motor is rated as 250 hp, 4.8 kV connected 60 Hz 12 poles with Xs=0.6 pu and Rs=0.01 pu. The motor rotational losses are 1.5 kW and the excitation power is 6 kW. The motor is supplied by rated voltage at the stator.
An electrical device has a linear temperature response. The device has a resistance of 120Ω ata temp of -20 degrees celcius and a resistance of 190 Ω at a temp of 120 degrees celcius. a. Calculate the resistance at a temp of 0 degrees celcius.
Determine the magnitude of the current when the machine develops its maximum gross power with the excitation held constant.
Consider a 4 input, 1 output digital system (W,X,Y,Z, and f respectively) . Design a POS circuit with any number of inputs such that f(W,X,Y,Z) = M(0,2,4,9,13) + D(6,14).
A pinecone falls straight down from a pine tree growing on a 20 degree slope. The pinecone hits the ground with a speed of 10 m/s. What are the components of the pinecone's impact velocity: a. parallel and b. perpendicular to the ground
Use as many components as you can to to minimize adders delay. Show the entire Divide and Conquer Tree in which it is clear for each break up node in the tree, whether the stitch-up is a "wake" up or "speculation"
A proportional controller for a rotating antenna has a gain of Kp of 5 in-oz/deg. The antenna was initially pointing south, but was then commanded to point southeast. Find the torque applied to the antenna in in-oz, when the antenna is within 5° o..
Let a series R-L-C network be connected to a source voltage V, drawing a current I. a) In terms of the load impedance Z=Z at angle of Z, find expressions for P and Q from complex power considerations.
An autotransformer with a total of 600 turns has its secondary winding embracing 200 turns. The 600 turns are connectred to a 60Hz, 2400V driving voltage. A load connected to the secondary draws 4.8kVA at 0.6 power factor lagging.
What is the magnitude of the frequency component at 30 kHz? The square wave is passed through an ideal rectangular low pass filter that completely attenuates all frequencies higher than 35 kHz. Write down an equation for the spectrum at the output ..
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