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Show that in the low-temperature region the electron density in an n-type material varies as Ne = Nc^(1/2)*Nd^(1/2)*e^(-(Eg-Ed)/2kT) Assume Ne=Nd+ and that the donors are only lightly ionized in that temperature range therefore Ef>Ed.
Find the magnetic field intensity using the concept of vector magnetic potential for plane z = 0 carrying uniform current K =Ky ayz.
This bar is made of AISI 1006 cold-drawn steel and is loaded by the forces F=0.55 kN and T=25.N.m. Use both the maximum-shear theory and the distortion-energy theory to design the bar diameter D.
A thin spherical shell of 0.4 kg and a diameter of 0.2 m is filled with alcohol of density 800 kg/m^3. It is released from rest at the bottom of a container of water. Calculate the acceleration of the shell as it rises to the surface.
Design a combinational circuit that detects an error in the representation of decimal digit in Excess-3. The output of the circuit must be equal to logic-1 when the inputs contain any one of the six invalid Excess-3 codes.
1. An operator prepares an 8-bit binary value with a dip switch. 2. A momentary contact switch (single-pole-single throw) connected to only one end of a cross-coupled NAND latch is activated. This sets the output of the latch to a logic one.
How to calculate the emf induced by an alternative magnetic field in a straight-line conductor of lenght L.
Calculate the number of resistors and switches needed for a resistor ladder DAC for each case: a. 3 bit DACb. 7 bit DAC c. 25 bit DAC d. 42 bit DAC
A conducting sphere of radius R is spinning at an angular speed ! in presence of an uniform magnetic field ˆzBo. Find the emf induced between north pole N and any point on the equator E. Hint- what is the emf induced between two end points
A current of 2 A flows through a slab of tin, 1 mm thick and 2mm wide, whose conductivity is 106 1/Ωm. Calculate the voltage drop between twopotential probes that are 10 cm apart along the slab.
An AM modulator is operation with an index of 0.4. The modulation input is: m(t) = 4cos (3πfmt) + 2cos (5πfmt) + 4cos (7πfmt) What is the efficiency of the modulator Sketch the spectrum of the modulator output showing the weights of all impulse funct..
Two LTIC systems have impulse response functions given by h1(t)=(1-t)[u)t)-u(t-1)] and h2(t)=t[u(t+2)-u(t-2)].a) Carefully sketch the functions h1(t) and h2(t). b) Assume that the two systems are connected in parallel.
The Fourier transforms of odd and even functions are very important. The reason is that they are computationally simpler than the Fourier transform. Let x(t) = e-ItI and y(t) = e-tu(t) - etu(-t). a. Plot x(t) and y(t), and determine whether they ar..
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