(d) Look carefully at your drawing above. In what direction does E point (inward? outward? tangent?) at various locations on the Gaussian surface? Redraw your Gaussian surface below and draw short arrows on the surface indicating the direction of E on the Gaussian surface. +Q• (e) Consider the following argument from a student who is trying to detemine E somewhere on the previous Gaussian surface: "The total charge enclosed by the surface is zero. According to Gauss’ law this means the total electric field flux through the surface is zero. Therefore, the electric field is zero everywhere on the surface." Which, if any, of the three sentences are correct? Explain how the student came to an incorrect conclusion.

College Physics
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Author:Raymond A. Serway, Chris Vuille
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Chapter15: Electric Forces And Electric Fields
Section: Chapter Questions
Problem 36P: (a) Sketch the electric field pattern around two positive point charges of magnitude 1 C placed...
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(d) Look carefully at your drawing above. In what direction does E point (inward?
outward? tangent?) at various locations on the Gaussian surface? Redraw your
Gaussian surface below and draw short arrows on the surface indicating the
direction of E on the Gaussian surface.
+Q•
Consider the following argument from a student who is trying to determine E
somewhere on the previous Gaussian surface:
"The total charge enclosed by the surface is zero.
According to Gauss’ law this means the total electric field
flux through the surface is zero. Therefore, the electric field
is zero everywhere on the surface."
Which, if any, of the three sentences are correct?
Explain how the student came to an incorrect conclusion.
Transcribed Image Text:(d) Look carefully at your drawing above. In what direction does E point (inward? outward? tangent?) at various locations on the Gaussian surface? Redraw your Gaussian surface below and draw short arrows on the surface indicating the direction of E on the Gaussian surface. +Q• Consider the following argument from a student who is trying to determine E somewhere on the previous Gaussian surface: "The total charge enclosed by the surface is zero. According to Gauss’ law this means the total electric field flux through the surface is zero. Therefore, the electric field is zero everywhere on the surface." Which, if any, of the three sentences are correct? Explain how the student came to an incorrect conclusion.
6. Consider two point charges of opposite sign as shown:
X
+Q
-오
(a) In what direction is the electric field at the point indicated? Draw a vector on the
sketch above at the point X to represent E. [Hint: Use vector addition.]
(b) On the sketch below, draw several (at least ten) electric field lines for the
configuration above. This should be enough to indicate E in much of the vicinity
of the two charges.
(c) On your drawing above, add a spherical Gaussian surface that encloses both
charges, centered on the point midway between the charges. Make it fairly large,
but be sure several of the electric field lines penetrate the Gaussian sphere. Add
more field lines as needed.
Transcribed Image Text:6. Consider two point charges of opposite sign as shown: X +Q -오 (a) In what direction is the electric field at the point indicated? Draw a vector on the sketch above at the point X to represent E. [Hint: Use vector addition.] (b) On the sketch below, draw several (at least ten) electric field lines for the configuration above. This should be enough to indicate E in much of the vicinity of the two charges. (c) On your drawing above, add a spherical Gaussian surface that encloses both charges, centered on the point midway between the charges. Make it fairly large, but be sure several of the electric field lines penetrate the Gaussian sphere. Add more field lines as needed.
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