Gauss's Law and Electric Field
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Questions and Answers

What is the direction of the electric field on a spherical Gaussian surface?

  • Parallel to the normal to the surface
  • Radial, pointing outward (correct)
  • Opposite to the normal to the surface
  • Tangential to the surface

    • In Gauss's law, what does 'q' represent when calculating the electric field?

  • Charge on the Gaussian surface
  • Total charge in the universe
  • Charge at infinity
  • Charge enclosed by the Gaussian surface (correct)

    • For a neutral atom, what is the total electric field inside a Gaussian spherical surface with radius 'r'?

  • Non-zero
  • Decreasing with radius 'r'
  • Increasing with radius 'r'
  • Zero (correct)

    • What determines the properties of atoms, molecules, and bulk matter according to the text?

    <p>Electric and magnetic forces</p> Signup and view all the answers

    What do conductors allow according to the text?

    <p>Movement of electric charge through them</p> Signup and view all the answers

    What are the mobile charges in metals according to the text?

    <p>-Charges only</p> Signup and view all the answers

    What does the term q on the right side of Gauss’s law stand for?

    <p>The sum of all charges enclosed by the surface</p> Signup and view all the answers

    In what situation does the electric field on the left side of Gauss’s law account for both inside and outside charges?

    <p>When both inside and outside charges are present</p> Signup and view all the answers

    What is the purpose of choosing a Gaussian surface in applying Gauss’s law?

    <p>To simplify calculations of electrostatic fields with symmetry</p> Signup and view all the answers

    Why should a Gaussian surface never pass through a discrete charge?

    <p>Because the electric field due to discrete charges is not well defined at their location</p> Signup and view all the answers

    Which type of charge distribution allows a Gaussian surface to pass through it as per Gauss’s law?

    <p>Uniformly distributed charges</p> Signup and view all the answers

    What does a violation of Gauss’s law indicate in terms of Coulomb’s law?

    <p>A departure from the inverse square dependence on distance</p> Signup and view all the answers

    What can be said about the symmetry of the electric field around an infinitely long straight uniformly charged wire?

    <p>The electric field has the same magnitude at all points around the wire.</p> Signup and view all the answers

    What is the direction of the electric field around an infinitely long straight uniformly charged wire?

    <p>Radial outward if the charge density is positive and radial inward if it is negative.</p> Signup and view all the answers

    Why does the electric field around the wire not depend on the position along its length?

    <p>Due to the infinite length of the wire.</p> Signup and view all the answers

    What is the shape of the Gaussian surface used to calculate the electric field around the wire?

    <p>Cylindrical</p> Signup and view all the answers

    How does considering a pair of line elements contribute to understanding the electric field around the wire?

    <p>It shows that the total field at any point must be radial.</p> Signup and view all the answers

    What can be inferred about the net electric field within a plane cutting an infinitely long straight uniformly charged wire normally?

    <p>It is radial and depends only on the radial distance from the wire.</p> Signup and view all the answers

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