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English Essay

  • Submitted by: devaraj53018
  • on March 24, 2012
  • Category: English
  • Length: 499 words

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Below is an essay on "English" from Anti Essays, your source for research papers, essays, and term paper examples.

Conductor at Equilibrium
For a conductor at equilibrium:  

1. The net electric charge of a conductor resides entirely on its surface. (The mutual repulsion of like charges from Coulomb's Law demands that the charges be as far apart as possible, hence on the surface of the conductor.)

2. The electric field inside the conductor is zero. (Any net electric field in the conductor would cause charge to move since it is abundant and mobile. This violates the condition of equilibrium: net force = 0.)

3. The external electric field at the surface of the conductor is perpendicular to that surface. (If there were a field component parallel to the surface, it would cause mobile charge to move along the surface, in violation of the assumption of equilibrium.)
Conductor at Equilibrium
For a conductor at equilibrium: | |
1. The net electric charge of a conductor resides entirely on its surface. (The mutual repulsion of like charges from Coulomb's Law demands that the charges be as far apart as possible, hence on the surface of the conductor.)
2. The electric field inside the conductor is zero. (Any net electric field in the conductor would cause charge to move since it is abundant and mobile. This violates the condition of equilibrium: net force = 0.)
3. The external electric field at the surface of the conductor is perpendicular to that surface. (If there were a field component parallel to the surface, it would cause mobile charge to move along the surface, in violation of the assumption of equilibrium.)
Gaussian Surfaces
Part of the power of Gauss' law in evaluating electric fields is that it applies to any surface. It is often convenient to construct an imaginary surface called a Gaussian surface to take advantage of the symmetry of the physical situation.

If the symmetry is such that you can find a surface on which the electric field is constant, then evaluating the electric flux can be done by just multiplying the value of the field times the area of...

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