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An engineer 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).
Describe how a dielectric material responds to an alternating electric field.
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.
Describe two flaws with this initial experimental set-up.
Briefly (half a page max) describe a commercial system of measuring permittivity including all appropriate references.
The magnitude of the acceleration of the block is 1.93 m/s^2 (a) Find the coefficient of kinetic friction between block and plane? I got 0.393 but it is wrong. (b) Find the speed of the block after it has slid 1.90 m
Unpolarized light is incident on three polarizers: The first making an angle of 0 degrees with the vertical; the second making an angle of ? degrees with the vertical; and the last one making an angle of 90 degrees with the vertical.
1) What is the dynamic range for an 8-bit ADC 2) A device that responds to a small current or voltage change by activating a mechanical switch allowing a larger amount of current flow is a: a) transistor. b) transducer. c) solenoid. d) relay.
A certain cache has an access time of 2 nanoseconds and a hit percentage of 95%. If the main memory access time is 8 nanoseconds, what is the average access time for a read operation?
A square-law modulator for generating an AM wave relies on the useof a nonlinear device. The given figure depicts the simplest form of such amodulator. Ignoring the higher order terms, the input-output characteristics of thediode-load resistor
A 1 load draws 6 MW at 0.8 power factor lagging. Determine the reactive power required from a parallel capacitor to bring the power factor of the parallel combination up to 0.93
Phosphorous is an n-type dopant in Si since it introduces extra electrons to Si (an P atom has 1 more valence electron than Si). It is widely used in making semiconductor devices (p-n junctions for example).
When the beam is not broken, light from the transmitter hits the receiver and turns on the output transistor from the receiver. Their purpose is to detect objects as the objects break the beam. design a through-beam photoelectric sensor
If a circuit contains 3 automatic switches and we want that, with a probability of 95%, during a given time interval they are all working, what probability of failure per time interval can we admit for a single switch
Design a combinational circuit that compares two 4-bit numbers to check if they are equal. The circuit output is equal to 1 if the two numbers are equal and 0 otherwise.
moore sequential circuit has one input and one output, that creates a pulse when ever its input signal goes from 1 to 0 after this pulse a new pulse will not be given unless the input signal is again returned to 1 and then tranistion back to 0.
b)what is the total power in the signal the power in the DC portion of the signal and the power in the time-varying portion of the signal c) write the equation for and sketch the power spectral desity of the random signal
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