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show that the resistivity of intrinsic Ge at 300k is 44.44 ohm-cm. If donor impurity is added to an extent of 1 atom per 10^8 Ge atoms, prove that the resistivity of the Ge sample drops to 4.42 ohm-cm (at 300k). Assume that the electron mobility is 3800 cm^2/v*s, and the hole mobility is 1800 cm^2/v*s; ni=2.5x10^13 electrons per cm^3; and, number of G2 atoms per cm^3=4.41x10^22.
What is the power level entering the first active stage of the receiver at 1900 MHz being fed by a 25 meter coax with a loss of 20 dB/km, given that the Isotropic Receive Level is -134 dBW and the receiving station has a 1 meter radius dish
1.) (a) What is the difference between the sign-magnitude and 2's-complement systems of representing signed binary numbers. (b) What is the advantage of using the 2's-complement system to represent signed numbers.
A 250hp, 500v dc shunt motor draws a nominal field current of 5A under rated load. The resistance is 90ohms. Calculate the ohmic value and power of the series resistor needed so that the field current drops to 4.5A
A small circular parabolic reflector, often referred to as dish, is now being advertised as a TV antenna for direct broadcast. Assuming the diameter of the antenna is 1 meter, the frequency of operation is 3 GHz, and its aperture efficiency is 68%
Calculate the 5 lowest possible energies of an electron in a hydrogen atom in units of electron volts. Identify all possible electron energies between the lowest energy and 2eV.
Assuming that the scores are normally distributed and the standard deviation for the scores is 80, find the probability that a randomly selected business graduate student at this school has a GMAT score over 700.
A digital communication system employs differentially encoded BPSK modulation scheme with non-coherent (differential) reception. If the Eb/N0 is 8 dB, what is the probability of bit error for the system
Consider the router diagram in Figure 3. Consider that the packets shown are uniformly 500kB in size and that they are all stored in the input buffers of ports W, X and Y. These packets marked with the output buffer they are destined for.
The EPROM should be mapped in a single block starting at address 0000 hex and the RAM should be mapped in a single block starting at address 8000 hex. 8051: Hardvard architecture with separate control busses for code and data memory.
A balanced D-connected load is fed by a three-phase supply for which phase C is open and phase A is carrying a current of 10
write a C program to toggle both PA4 and PA7 of PORTA ON and OFF, with a 1-ms delay after each toggle. Assume that clock frequency is 6.25 MHz. Write inline assembly-language code inside of the delay function.
Imagine a network layer packet that travels from one host to another host across multiple local area networks interconnected by routers, Explain how the packet moves from device to device through the network.
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