Book edition 10th Edition

Author(s) David Halliday

Pages 1328 pages

ISBN 9781118230718

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Short Answer

A particle of charge $+ q$ is placed at one corner of a Gaussian cube. What multiple of $q / ε_{0}$ gives the flux through (a) each cube face forming that corner and (b) each of the other cubes faces?

The multiple that gives the flux through each cube face is zero.
The multiple that gives the flux through each of the cube’s faces are 1/24 or 0.0417.

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Step by Step Solution

TABLE OF CONTENTS :

TABLE OF CONTENTS

Step 1: The given data

The total flux through any surface that completely surrounds the point charge is $q / ε_{0}$

Step 2: Understanding the concept of Gauss law

Using the concept of Gauss law and the planar symmetry, we can get the net flux through each cube face by considering the concept of total flux through the cube.

Step 3: a) Calculation of the multiple factors for flux through each face

If we stack identical cubes side by side and directly on top of each other, we will find that eight cubes meet at any corner.

Thus, one-eighth of the field lines emanating from the point charge pass through a cube with a corner at the charge, and the total flux through the surface of such a cube is $q / 8 ε_{0}$ .

Now the field lines are radial, so at each of the three cube faces that meet at the charge, the lines are parallel to the face and the flux through the face is zero.

Step 4: b) Calculation of the multiple factors for flux through each of the other cubes’ faces

The fluxes through each of the other three faces are the same, so the flux through each of them is one-third of the total.

That is, the flux through each of these faces is given as:

$\frac{1}{3} \times (\frac{q}{8 ε_{0}}) = \frac{q}{24 ε_{0}}$

Thus, the multiple factors are 1/24 or 0.0417.

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Fundamentals Of Physics

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Short Answer

A particle of charge $+ q$ is placed at one corner of a Gaussian cube. What multiple of $q / ε_{0}$ gives the flux through (a) each cube face forming that corner and (b) each of the other cubes faces?

Step by Step Solution

Step 1: The given data

Step 2: Understanding the concept of Gauss law

Step 3: a) Calculation of the multiple factors for flux through each face

Step 4: b) Calculation of the multiple factors for flux through each of the other cubes’ faces

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Short Answer

A particle of charge +q is placed at one corner of a Gaussian cube. What multiple of q/ε0 gives the flux through (a) each cube face forming that corner and (b) each of the other cubes faces?

Step by Step Solution

Step 1: The given data

Step 2: Understanding the concept of Gauss law

Step 3: a) Calculation of the multiple factors for flux through each face

Step 4: b) Calculation of the multiple factors for flux through each of the other cubes’ faces

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