X1. A straight, cylindrical wire lying along the x-axis has a length of 0.5 m and a diameter of 0.2 mm. It is made of a material described by Ohm's law with a resistivity of p = 4.0x108 2. m. Assume that a potential of 4.0 V is maintained at the left end of the wire at x = 0. Also assume that V = 0 at x = 0.5 m. Find (a) the magnitude and direction of the electric field in the wire, (b) the resistance of the wire, (c) the magnitude and direction of the electric current in the wire, and (d) the current density in the wire. (e) Show that E = pJ.

X1. A straight, cylindrical wire lying along the x-axis has a length of 0.5 m and a diameter of 0.2 mm. It is made of a material described by Ohm's law with a resistivity of p = 4.0x108 2. m. Assume that a potential of 4.0 V is maintained at the left end of the wire at x = 0. Also assume that V = 0 at x = 0.5 m. Find (a) the magnitude and direction of the electric field in the wire, (b) the resistance of the wire, (c) the magnitude and direction of the electric current in the wire, and (d) the current density in the wire. (e) Show that E = pJ.

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 63P

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