A straight cylindrical wire lying along the x axis has a length of L= 2.4 m and a radius of r=0.2mm. The a resistivity of the wire's material is p= 2x10-8 Qm. If the potential difference across the ends of wire is V = 8 Volts,calculate the magnitude of the current density (J=?).O A. 6.25 x 108 A/m2• B. 1.667 x 108 A/m2• C. 2.086 x 10S A/m?D. 3.407 x 108 A/m2

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A straight eylindrical wire lying along the x axis has a length of L = 2.4 m and a radius of r = 0.2mm. The a resistivity of the wire's material is p = 2x10 Qm. If the potential difference across the ends of wire is V = 8 Volts, calculate the magnitude of the current density (J=?). • A. 6.25 x 10° A/m? B. 1.667 x 10° A/m2 C. 2.086 x 10$ A/m2 O D. 3.407 x 10° A/m2

A straight eylindrical wire lying along the x axis has a length of L = 2.4 m and a radius of r = 0.2mm. The a resistivity of the wire's material is p = 2x10 Qm. If the potential difference across the ends of wire is V = 8 Volts, calculate the magnitude of the current density (J=?). • A. 6.25 x 10° A/m? B. 1.667 x 10° A/m2 C. 2.086 x 10$ A/m2 O D. 3.407 x 10° A/m2

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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Concept explainers

Microscopic view of current

In physics, the term current is expressed as the rate of flow of electric charges across the area per unit time (I=q/t). It propagates along in the direction of the motion of positive charges. When the current is caused by the motion of electrons, the direction of the current is opposite to the flow.

Question

A straight cylindrical wire lying along the x axis has a length of L= 2.4 m and a radius of r=0.2mm. The a resistivity of the wire's material is p= 2x10-8 Qm. If the potential difference across the ends of wire is V = 8 Volts,
calculate the magnitude of the current density (J=?).
O A. 6.25 x 108 A/m2
• B. 1.667 x 108 A/m2
• C. 2.086 x 10S A/m?
D. 3.407 x 108 A/m2

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