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(a) Adding dopants to a sample of silicon is found to reduce the Hall coefficient by a factor of 10 and increase the conductivity by a factor of 5. What effect has this dopant addition had on the mean free path?
(b) In a Hall experiment with a transverse magnetic field of 20 tesla, the total electric field is at angle 20o to the current. Assuming the charge carriers to be electrons, what is their collision time?
(c) If you doubled the width of a Hall sample but kept J and B the same, how would that affect the Hall field? the Hall voltage? the net charge density along the edges?
Electrical wiring: Potentials of neutral and earth wires, Why is the neutral wire in housing circuits also at zero potential
A control System with feedback has the following characteristic equation: s3 + (1 + K)s2 + 10s + (5 + 15K) = 0 The parameter K must be positive. When K is equal a single loop of wire with an enclosed area of 0.0900 m^2 is in a region of uniforfm mag..
In the case of a problem in the communication process in general (not just using Fieldbus), describe how you would troubleshoot a communications problem at the physical layer. Describe also the tools that you would use to troubleshoot the communic..
Nyquist sampling rate condition and aliasing Consider the signal: X(t) = sin(0.5)/0.5t a.)Find the Fourier transform X(Ω) of x(t). b.)Is x(t) band limited. If so, find its maximum frequency Ωmax.
Specifications of an analog filter are given below: Butterworth highpass filter Absolute passband gain=1 3-dB cutoff frequency at 4000 radians/second 40 dB attenuation at the stop frequency of 800 radians/second
Recall that for discrete sequences the ts sample period (the time period between samples) is the reciprocal of the sample frequency fs. Write the equations, describing time-domain sequences for unity-amplitude cosine waves
Assume that a stuck-at-1 fault occurs at the output of the circuit ((A+B)(B+C))'. Determine the test pattern that detects the fault. Repeat for a stuck-at-0 fault at the output.
Determine the position x and the tension in the cord that is required for equilibrium. The cord passes through the smooth ring at B and has an unstretched length of 6ft and stiffness of k = 50lb/ft.
What is the inverse Laplace transform of 32/s(s^2+64). Please show all work.
A Rankine-cycle steam power plant has a 5-MPa/450C throttle and 10-kPa condenser pressure. What are the net work, steam generator heat addition, thermal efficiency, heat rate, and turbine exit quality
The maximum voltage that James can apply to this capacitor is limited by Vmax = Kd, where K is the breakdown strengh of the dielectric. deriven an expression for the maximum energy that can be stored in this capacitor in terms of K and the volume ..
Write a program that uses the rand_float functions developed to generating sequences of random floating-point values between 4 and 10. Then compare the computed mean and variance to the theoretical values computed.
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