(Indicates a review question, which means it requires only a basic understanding of the material to answer. Questions without this designation typically require integrating or extending the concepts presented thus far.)
. If a new material is found that is a superconductor at all temperatures, what parts of some common electric deices would definitely not be made out of it? Explain.
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Chapter 7 Solutions
Bundle: Inquiry Into Physics, 8th + Webassign Printed Access Card For Ostdiek/bord's Inquiry Into Physics, 8th Edition, Single-term
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Glencoe Physics: Principles and Problems, Student Edition
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Schaum's Outline of College Physics, Twelfth Edition (Schaum's Outlines)
Essential Cosmic Perspective
Physics of Everyday Phenomena
The Physical Universe
- Two concentric metal spherical shells, of radius a and b, respectively, are separated by weakly conducting material of conductivity ơ (see part (a) of figure). (a) (b) a. If they are m aintained at a potenti al difference V, what current flows from one to the other? b. What is the resistan ce between the shells? c. Notice that if b > a the outer radius bis irrelevant. How do you account for that? Exploit this observation to determine the current flowing between two metal spheres, each of radius a, immer sed deep in the sea and held quite far apart (see part (b) of figure), if the potential difference between them is V. (This arr angement can be used to measure the conductivity of sea water.)arrow_forwardWebster, Saqlain 1. An 8.0-nF capacitor with an initial charge of 10 mC is discharged through a 5-k2 resistor. (a) Calculate the current in the resistor 2 us after the resistor is connected across the terminals of the capacitor. (b) What charge remains across the capacitor after 6 us? (c) What is the maximum current across the resistor? Boot Barn ummary Order Number: BB05646144 Fulfillme.. 2. Determine that the amount of work required to assemble four identical point charges ofarrow_forwardQuestion 1 a) What is Hall Effect? Explain briefly. b) Show that the number density n of free electrons in a conductor wire is given in terms of the Hall electric field strength E, and the current density J, as n=JB/(eE). (Here we have J=i/A; i is the electric current intensity, and A is the cross-sectional area of the wire.) c) Calculate the voltage V sideway across the conductor given the following. The conductor wire has a square cross section of side d=150 µm. (Note 1 um= 10-6 m.) The magnetic field applied to the conductor has the strength B= 0.60 Tesla. The current going through the conductor is i = 25 A. The density of free electrons in the conductor is n= 8.47 x 1028 electrons/m³. Note further that we have by definition V=Ed.arrow_forward
- Question 1 a) What is Hall Effect? Explain briefly. b) Show that the number density n of free electrons in a conductor wire is given in terms of the Hall electric field strength E, and the current density J, as n=JB/(eE). (Here we have J-i/A; i is the electric current intensity, and A is the cross-sectional area of the wire.) c) Calculate the voltage V sideway across the conductor given the following. The conductor wire has a square cross section of side d=150 µm. (Note 1 um= 10-6 m.) The magnetic field applied to the conductor has the strength B=0.60 Tesla. The current going through the conductor is i = 25 A. The density of free electrons in the conductor is n= 8.47 x 10²8 electrons/m³. Note further that we have by definition V=Ed.arrow_forwardBook:(Grifith electrodynamics eddition 4).arrow_forward3) a) A wire sample (1 mm in diameter by 1 m in length) of an aluminum alloy (containing 1.2% Mn) is placed in an electrical circuit such as that shown in the figure below. A voltage drop of 432 mV is measured across the length of the wire as it carries a 10 A current. Calculate the electrical conductivity of this alloy - Length, I Area, A Sample geometry b) Copper has an electrical conductivity of 58.00 × 10° S/m and a free electron density of 104 x 10"m³. Calculate the drift velocity of these electrons under an electric field of 0.5 V/m.arrow_forward
- 1) a) A wire sample (1 mm in diameter by 1 m in length) of an aluminum alloy (containing 1.2% Mn) is placed in an electrical circuit such as that shown in the figure below. A voltage drop of 432 mV is measured across the length of the wire as it camies a 10 A current. Calculate the electrical conductivity of this alloy -Length, / Area, A Sample geometry b) Copper has an electrical conductivity of 58.00 x 106 S/m and a free electron density of 104 x 10²7m²³. Calculate the drift velocity of these electrons under an electric field of 0.5 V/m.arrow_forwardTwo people are debating electron flow versus conventional flow. One of them says that you will get different results predicting polarity of voltage drops in a resistive circuit depending on which convention you use. The other person says that the convention for labeling current does not matter at all, and the Great job! You have understood the lesson. Are you now ready to summarize? ANSWER: correct polarities will be predicted either way. Which of these two people is correct? Explain why, and give an example to prove your point.arrow_forwardExample: A conducting line on an IC chip is (2.8 mm) long, and has a rectangular cross-section (1x 4 um). A current of (5 mA) produces a voltage drop of (100 mV) across the line. Determine the electron concentration given that the electron mobility is (500 cm?/V.Sec.).arrow_forward
- Q6) The current density J= 4p ap µA/m2. find : 1) The total current crossing a cylinder surface bounded by: p=lm , 03 ¢s 2n, 0s2<2m 2) The currnet crossing a sheet z-5m. 3) If the volume charge density at p-im is pv-10nc/m find the charge velocity there.arrow_forwardA flow of 50 m3/s of air exits a manufacturing facility, containing particles whose drift velocity is 0.121 m/s. Assume that 99.2 percent removal efficiency is required. (a) Calculate the total plate surface area for an electrostatic precipitator. (b) Estimate how many plates are needed. Assume the plates available for this unit measure 2 m by 5 m.arrow_forwardA solid conductor has a conductor area of 2,774 kcmils, what is the diameter of this conductor in inches: Correct Answer: 3.331 + 0.01arrow_forward
- Glencoe Physics: Principles and Problems, Student...PhysicsISBN:9780078807213Author:Paul W. ZitzewitzPublisher:Glencoe/McGraw-Hill
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