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The National Electrical Code specifies, among otherthings, values for the minimum allowable cross-sectional area ofconductors for a given voltage and allowable total length ofcircuits depending on the diameter of conductor used. Based on your knowledge of the motion of charge carriersand the origins of electrical resistivity, a) explain why there isa minimum allowable cross-sectional area for a given appliedvoltage, b) what needs to be considered when calculating it, c) why there is a maximum allowable total length of electrical circuitsfor a given conductor diameter, and d) what needs to be consideredwhen calculating it.
for the polynomal function P(x) = x^2 / 3 + x^2 - 8x + 1 find all relative extrema, the inflection point, the interval on which P is concave down
A 2400-115V transformer has a sinusodial flux expressed by φ=0.113 sin 188.5t. determine the primary and secondary turns.
attend a surplus electronics auction and buy a fancy spot light for the car. when you get home you realized why nobody else bid on the light as it contains a 45-watt, 9 volt bulb and your car ( like most ) has a 12-volt electrical system.
A 50-cm-long copper wire with a cross-sectional area 1.2286x10^-10 m^2 is used to connect a voltage source and a device. What is the maximum voltage if the current is required to be not bigger than 5A
Suppose two points P1 and P2 are tossed at random and independently onto a line segment of length L. What is the probability that the absolute distance between the two points does not exceed l.
b unit vector a θ dotted with unit vector a y (dotted means dot product) θ is from spherecial coordinates and starts from the postive z direction c unit vector a r crossed with unit vector a x (crossed means cross product).
Design a 4-bit down-counter that has three control inputs: cnt enables counting up, clear syncrhonously resets the counter to all 0s, and set syncrhonously sets the counter to all 1s a) using a parallel load register as a buildi..
A measurement team has determined that the average path loss exponent in the system isn n= 3. Determine the major radius of each cell if a seven-cell reuse pattern is used. What is the major radius if a four cell reuse pattern is used
A single-phase transformer has two 120V windings (primary) and one 240V windings (secondary) such that with the two primary in series properly (dot to no dot) the transformer is a 240:240V transformer. A test is run on one of the primary coils (one..
Two 1-km fibers are spliced together. Each fiber has a 3-dB loss, and the splice adds 2 dB of loss. If the power entering is 2 mW, then how much power is delivered to the end of this combined transmission line
Determine the magnitude of the current when the machine develops its maximum gross power with the excitation held constant.
Explain the characteristics of electromagnetic waves and application to communications systems and determine the signal spectra for the content of complex waveforms
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