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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?
Determine experimentally the value of a resistor that when placed across the battery will make a measurable change in measured battery voltage. Keep the voltage decrease from open circuit value to 10% or less.
The discussion must address phase angle relationships of current and voltage. The answer must include the effect of source frequency on the voltage drolps across the resistor and the inductor at very loave and very high frequency values.
2. Compute the symbol error probability for both constellations in terms of the Gaussian error integral Q(x). 3. Compute the bit error probability for both constellations in terms of the Gaussian error integral.
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.
Modify the above VHDL code so that in addition to the 6 outputs listed above, the circuit outputs the largest and the smallest operands on the new outputs ‘largest' and ‘smallest'. Also output the sum, difference and product of the two operands A ..
a DC shunt machine ( 24kW, 240V, 1000 RPM) has Ra= .12 ohms, Nf= 600 turns/pol. The machine is operated as a seperately excited dc generator and is driven at 1000 RPM. When If = 1.8 amps the no load terminal voltage is 240V.
In this project we will consider the control of a synchronous generator supplying electricity to the grid.
For the system represented by the following difference equation y[n] = 0.5x[n] + 0.5x[n - 1] find: (a) the transfer function H(z) of the system. (b) the frequency response H(e^jw) of the system.
What is the peak frequency deviation of the FM signal and bandwidth of the FM signal? The signal is received with CNR = 30.0 dB. What is the SNR of the recovered video signal at the radio receiver output?
a) Implement the function F using a minimum number of NAND gates; no additional gates may be used, but you can assume that all variables and their complements are available. e) Implement the function F using only a 3-to-8 decoder
You have a 10 nH inductor. What value of capacitor should you put in series with the inductor to achieve an impedance of Z=j50 ohm at f=1.0 GHz
A 1000 turns wire are tighly wound on a toroid with a rectangular cross section, the heigh of toroid is 0.5 cm . The inner and outer radii of 2 cm and 3cm respectively. The current in the wire I=100 mA, Ur = 4000. N= 1000, Find H,B,phi and inducta..
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