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Many important engineering structures are often coated in a protective paint layer of some kind. This is not simply to improve the appearance of the structure but also to prevent corrosion and damage. There is some interest from industry to be able to track the solidification or drying of the paint layer as it happens to ensure correct thickness and material properties. One way to do this would be to measure the changing values of the permittivity of the paint layer as it dried.
An engineer initially decides to set up an experiment to try this idea out. He decides to use a large metal plate or substrate as one electrode, then paint it and then place another electrode (with a smaller area) directly on top of the paint layer. (The parallel plate equation is still a good approximation using the smallest value for A).1) Describe how a dielectric material responds to an alternating electric field.2) Describe how the permittivity might change with time for a polymer material like the paint as it dries and explain how this measurement could be used to find when the paint was totally dry.3) Describe two flaws with this initial experimental set-up.4) Briefly (half a page max) describe a commercial system of measuring permittivity including all appropriate references.
why does the instruction set include an INC (DEC) instruction to increment (decrement) a memory byte when the same function could be accomplishe using an ADD (SUB) instruction
An ultrasound image analog signal needs to be converted to a digital bit stream. The bandwidth of the signal is from 500 kHz to 2.0MHz, and the necessary resolution is 12 bits. determine the required sampling rate and the data rate
Design a combinational circuit with five inputs and two outputs. The inputs are D2, D1, D0, and C1 and C0. The circuit calculates the remainder R1 and R0 of the division of the binary number
A mummy picks up a calculator and starts adding odd whole numbers together, in order: 1+3+5+... etc. What will be the last number the mummy will add that will make the sum on his calculator greater than 10,000
An FM transmitter delivers to a 75 ohm antenna a signal voltage of V (t)= 1000 sin (10^9t+4 sin 10^4t), determine: (a) carrier frequency; (b) intelligence frequency; (c)modulation index; and (d)total power in FM signal
A system, linear and time invariant is described by the following difference equation: 4y[n-2] + 2y[n-1] + y[n] = x[n] a) Determine if the system is stable. b) Find the system response to the unit step.
Approximation of quarter circle using Bezier curve, Determine the Bezier curve of order 3 that approximates a quarter circle centered at (0,0), (1,0), (0,1).
a high power FM station of frequency 96.9 MHz has an antenna height of 1200 feet. If the signal is to be recieved 60 miles from the station, how high does the listener need to mount their anntena in this fringe area
The system contains a door sensor, a window sensor, and a key activation switch. If the switch is on, opening the window will set off the alarm immediately. Opening the door will start a 30 second timer.
Design a microstrip transmission line with Z0 =100 ohm that will be etched onto a sielectric substrate with er = 3 and a thickness of 4 mm. what should be the width of the microstrip line
A wire is stretched between two posts. Another wire is stretched between two posts that are twice as far apart. The tension in the wires is the same, and they have the same mass. A transverse wave travels on the shorter wire with a speed of 281 m/..
In a voltage stabilizer circuit with a Zener diode, the output voltage decreases when touching the zener diode with your fingers when no load is connected. Ideally, the output voltage should not drop. Explain why there is a decrease in output volt..
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