Physics, 20.03.2020 20:14 sunshine210421
The resistivity of a semiconductor can be modified by adding different amounts of impurities. A rod of semiconducting material of length L and cross-sectional area A lies along the x-axis between x=0 and x=L. The material obeys Ohm's law, and its resistivity varies along the rod according to rho(x)=rho0exp(−x/L). The end of the rod at x=0 is at a potential V0 greater than the end at x=L.1) Graph the function rho(x) for values of x between x=0 and x=L.2) Graph the function E(x) for values of x between x=0 and x=L.3) Graph the function V0(x) for values of x between x=0 and x=L. Part A
Find the total resistance of the rod.
Express your answer in terms of the given quantities and appropriate constants. Part B
Find the current in the rod.
Answers: 2
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Afisherman notices that his boat is moving up and down periodically without any horizontal motion, owing to waves on the surface of the water. it takes a time of 2.20 s for the boat to travel from its highest point to its lowest, a total distance of 0.670 m . the fisherman sees that the wave crests are spaced a horizontal distance of 5.80 m apart. (a) how much is the wavelength? (b) find the period of the wave. (c) how fast are the waves traveling? (d) what is the amplitude a of each wave?
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The resistivity of a semiconductor can be modified by adding different amounts of impurities. A rod...
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