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# QuestionsCh22 - CHAPTER 22 Gausss Law Responses to...

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CHAPTER 22: Gauss’s Law Responses to Questions 1. No. If the net electric flux through a surface is zero, then the net charge contained in the surface is zero. However, there may be charges both inside and outside the surface that affect the electric field at the surface. The electric field could point outward from the surface at some points and inward at others. Yes. If the electric field is zero for all points on the surface, then the net flux through the surface must be zero and no net charge is contained within the surface. 2. No. The electric field in the expression for Gauss’s law refers to the total electric field, not just the electric field due to any enclosed charge. Notice, though, that if the electric field is due to a charge outside the Gaussian surface, then the net flux through the surface due to this charge will be zero. 3. The electric flux will be the same. The flux is equal to the net charge enclosed by the surface divided by ε 0 . If the same charge is enclosed, then the flux is the same, regardless of the shape of the surface. 4. The net flux will be zero. An electric dipole consists of two charges that are equal in magnitude but opposite in sign, so the net charge of an electric dipole is zero. If the closed surface encloses a zero net charge, than the net flux through it will be zero.

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QuestionsCh22 - CHAPTER 22 Gausss Law Responses to...

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