Two very long wires, carrying free charge, of equal but opposite charge densities, A, of +0.2 nC/m, are placed parallel to each other (Figure 1). Each line has a diameter of 2 mm and they are separated by a distance d, of 1.0 cm. The distance d is measured from the centre point of each line. You may assume the charge distributions on the line are the same as if they were isolated in free space. +A A

Two very long wires, carrying free charge, of equal but opposite charge densities, A, of +0.2 nC/m, are placed parallel to each other (Figure 1). Each line has a diameter of 2 mm and they are separated by a distance d, of 1.0 cm. The distance d is measured from the centre point of each line. You may assume the charge distributions on the line are the same as if they were isolated in free space. +A A

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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A very large conducting plate lying in the xy plane carries a charge per unit area of +5.0 nC/m2. A second such plate located above the first plate at z = z0 and oriented parallel to the xy plane carries a charge per unit area of -5.0 nC/m2. Find the electric field for (a) z < 0, (b) 0 < z < z0, and (c) z > z0.
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An infinitely long uniform line charge lies along the x-axis. If the line charge has a density of 12 nC/m, determine E at point (7, 3, -4)m
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The three conductors of a 3-φ line are arranged at the corners of a right angled isosceles triangle. If each equal side of this triangle is 2 m, find line-to-neutral capacitance per km. Take the diameter of each conductor as 1·24 cm. The conductors are transposed at regular intervals.
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A certain conductor has a free electron density of 2 x 10 30 electrons per cubic feet. Its circular cross- sectional area is 150,000 square mils and 120 meters long. Its resistivity at 30 degrees Celsius is 0.9 x 10 – 8 ohm-meter. If a current of 3 A passes thru this conductor, find the drift velocity in mm per second.
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In a concentric spherical electrode system with outer sphere radius r2= 28 cm, the insulator is air in between, and the puncture field strength is Ed= 30 kV/cm. The puncture strength and outer sphere diameter are constant. Accordingly, determine the limit values of the inner sphere radius so that there is no discharge when 125 kV is applied to the system.
Given a coaxial capacitor with the length of L which has two coaxial conductors with radius a=1 cm and b= 4 cm for inner and outer conductor, respectively. The inner conductor carries the total charge of –Q C whilst the outer carries +Q C. If the length of the coaxial, L = 100m and the coaxial is filled with the lossy Teflon (εr = 2.2 and σ = 4 Sm-1), determine: i. Potential Different between r = 3cm and r = 6cm ii. Energy in region a<r<b Note: In dielectric material, permittivity ε=εoεr and D=εE