Physics, 13.03.2020 18:24 tingzontumbler8412
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 ?(x)=?0exp(?x/L). The end of the rod at x=0 is at a potential V0 greater than the end at x=L.
Find the total resistance of the rod.
Express your answer in terms of the given quantities and appropriate constants.
R =
.632L?0A
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Part B
Find the current in the rod.
Express your answer in terms of the given quantities and appropriate constants.
I =
V0A?0L(1?e?1)
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Part C
Find the electric-field magnitude E(x) in the rod as a function of x.
Express your answer in terms of the given quantities and appropriate constants.
E(x) =
V0e?xLL(1?e?1)
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Part D
Find the electric potential V(x) in the rod as a function of x.
Express your answer in terms of the given quantities and appropriate constants.
V(x) =
V0e?xL?e?11?e?1
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Part E
Graph the function ?(x) for values of x between x=0 and x=L.
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Part F
Graph the function E(x) for values of x between x=0 and x=L.
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Part G
Graph the function V0(x) for values of x between x=0 and x=L.
Answers: 3
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Alead ball is dropped into a lake from a diving board 5m above the water . it hits the water with a certain velocity and then sink with constant velocity in bottom . it reaches the bottom 5 second after it is dropped if g= 10m/s2 . find depth of the lake and average velocity of the ball ?
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When a bicycle coasts uphill, it moves slower and slower as it climbs. why? a. its kinetic energy is transforming into heat energy. b. its potential energy is transforming into kinetic energy. c. its kinetic energy is transforming into potential energy and heat energy. d. its potential energy is transforming into kinetic energy and heat energy.
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Arunner is jogging at a steady 3.6 km/hr. when the runner is 2.9 km from the finish line, a bird begins flying from the runner to the finish line at 14.4 km/hr (4 times as fast as the runner). when the bird reaches the finish line, it turns around and flies back to the runner. even though the bird is a dodo, we will assume that it occupies only one point in space, i.e., a zero-length bird. how far does the bird travel? (b) after this first encounter, the bird then turns around and flies from the runner back to the finish line, turns around again and flies back to the runner. the bird repeats the back and forth trips until the runner reaches the finish line. how far does the bird travel from the beginning? (i.e. include the distance traveled to the first encounter)
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The resistivity of a semiconductor can be modified by adding different amounts of impurities. A rod...
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