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A thin slot. Create a 2D TM mode simulation that is 100 × 200 grid cells, designed for a frequency of 300 MHz. Place a vertical "wall" of PEC material across the center of the simulation space, but with a hole in the center of a few grid cells. Excite the simulation with an z source to the left of the wall, and measure the field intensity that leaks through the hole. Vary the size of the hole from 20 down to one grid cell; how does the field intensity to the right of the wall depend on the hole size? Can you think of a way to do this simulation with a hole that is less than one grid cell wide? We will revisit this problem in Chapter 12.
design a new p-type semiconductor material. Acceptor density is Na=5x1015 cm^-3 and there are no donors are present in the material. The effective densities of states for this material is given as Nv=1.8x10^19cm^-3
1 kW heating element of a 230 V, 50 Hz electric stove is to be controlled by a triac circuit. The gate circuit of the triac uses a 0.2 mF capacitor and a diac with a break over voltage of 50 V. Calculate the adjustable resistance value to provide ..
part 1 - generating random variablesmost software libraries include a uniform random number generator that generates
What are two causes of core loss for a coil with an iron core excited by an ac current? What considerations are important in minimizing loss due to each of these causes? What happens to the power loss in each case if the frequency of operation is ..
The factorial of a nonnegative integer n is written n! (pronounced "n factorial") and is defined as follows: n!= n(n-1)(n-2)(n-3)....1 (for values of n greater than or equal to 1) and n!= 1 (for n=0) for example 5! = 5x4x3x2x1,
A magnetic flux of 400 microwebers passing through a coil of 1200 turns is reversed in 0.1 sec. Calculate the average value of the e.m.f induced in the coil. ( HInt use Faraday's Law)
describe the relationship between peak current peak-to-peak current and rms current. include in the discussion which
Design a square wave generator that will provide a 4kHz square wave with a positive peak vlaue of +10V and negative peak value of -10V. You may use any number of op amps, resistors, and capacitors in this design.
An internally compensated op amp is specified to have an open-loop gain of 106dB and a unity-gain bandwidth of 3MHz. Find fb and the open-loop gain in dB at fb.
An electrical signal with the spectrum extending from 10Hz to600Hz is recorded on a tape recoorder at 10cm per second. It isplayed back at 60cm per minute. What would be the minimum samplingrate for the playback signal
Draw the current waveform of the output resistor RL if VBR = 20 V, IH = 20 mA, and RL = 1000 ohms. Label the current graph with the correct value of the output current.
A music signal needs to be digitized by sampling and quantizing the continuous time signal. Assume the highest frequency present is 10 kHz and quantization by 8 bits is adequate. Find the number of bits required to store 3 minutes of music.
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