Wires A and B, having equal lengths of 40.0 mand equal diameters of 2.94 mm, are connectedin series. A potential difference of 62.9 V isapplied between the ends of the compositewire. The resistances are RA = 0.0996 Q and RB= 0.570 2. For wire A, what are (a) magnitude Jof the current density and (b) potentialdifference V? (c) Of what type material is wireA made (see the table below)? For wire B, whatare (d) J and (e) V? (f) Of what type material is Bmade?Resistivities of Some Materials at Room Temperature (20°C)Resistivity, p(N m)Temperature Coefficientof Resistivity, a (K¯')MaterialTypical Metals4.1 x 10-34.3 x 10-3Silver1.62 x 10-8Copper1.69 × 10-84.0 x 10-34.4 x 10-3Gold2.35 x 10-8Aluminum2.75 x 10-8Manganin"TungstenIron4.82 x 10-80.002 x 10-35.25 x 10-84.5 x 10-36.5 x 10-33.9 × 10-39.68 x 10-8Platinum10.6 x 10-8Typical Semiconductors2.5 x 103Silicon, pureSilicon, n-typeSilicon, p-type-70 x 10-38.7 x 10-42.8 x 10-3Typical Insulators1010 – 1014GlassFused quartz-1016"An alloy specifically designed to have a small value of a.*Pure silicon doped with phosphorus impurities to a charge carrier density of 1023 m-3."Pure silicon doped with aluminum impurities to a charge carrier density of 1023 m-.

Given length of wire A = length of wire B = 40 m diameter of wire A = diameter of wire B = 2.94 mm…

Wires A and B, having equal lengths of 40.0 m and equal diameters of 2.94 mm, are connected in series. A potential difference of 62.9 V is applied between the ends of the composite wire. The resistances are RA = 0.0996 Q and Rg = 0.570 Q. For wire A, what are (a) magnitudeJ of the current density and (b) potential

Wires A and B, having equal lengths of 40.0 m and equal diameters of 2.94 mm, are connected in series. A potential difference of 62.9 V is applied between the ends of the composite wire. The resistances are RA = 0.0996 Q and Rg = 0.570 Q. For wire A, what are (a) magnitudeJ of the current density and (b) potential

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter21: Current And Direct Current Circuits

Section: Chapter Questions

Problem 15P: If the current carried by a conductor is doubled, what happens to (a) the charge carrier density,...

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