() THE FOLLOWING QUESTIONS ARE BASED ON THE INFORMATION GIVEN HERE. A rod of semiconducting material of length L= 9 m and cross-sectional area A = 4 mm2 lies along the x-axis between z = 0 and x = L. The material obeys Ohm's law, and its resistivity varies along the rod according to p = Po (1- where Po = 1 x 10-42. m. The end of the rod at x = 0 is at a potential Vo = 30 V greater than the end at a = L. A) What is the total resistance, in units of 2, of the rod? Answer: B) What is the current, in units of miliamperes, in the rod? Answer:

() THE FOLLOWING QUESTIONS ARE BASED ON THE INFORMATION GIVEN HERE. A rod of semiconducting material of length L= 9 m and cross-sectional area A = 4 mm2 lies along the x-axis between z = 0 and x = L. The material obeys Ohm's law, and its resistivity varies along the rod according to p = Po (1- where Po = 1 x 10-42. m. The end of the rod at x = 0 is at a potential Vo = 30 V greater than the end at a = L. A) What is the total resistance, in units of 2, of the rod? Answer: B) What is the current, in units of miliamperes, in the rod? Answer:

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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(b) The density of iron is 7.85 g/cm3, and its atomic mass is 55.8. Assuming each iron atom contributes two mobile electrons to the metal, what is the number density of free charges in the wire, in electrons/m3? (Enter your answer without units.) (c) Use your results to calculate the drift speed (i.e., the average net speed) of the electrons in the wire. (d) Due to thermal motion, the electrons at room temperature are randomly traveling to and fro at 1.13×105 m/s, even without any current. What fraction is the current's drift speed, compared to the random thermal motion?
The next five questions use this description. Dry air is a pretty decent insulator; it has a very high resistivity of 3 × 10³ Q · m . Consider a capacitor that has square plates 15 cm on a side, separated by 0.8 mm of dry air. The capacitor is charged such that it has a potential of 320 V between the plates. First, what is the resistance of the volume of air between the plates in G2 (to 3 significant digits)?
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