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3 &acirc;€“ Gauss's Law and Electric Fields

# 3 &acirc;€“ Gauss's Law and Electric Fields -...

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Physics 8B 3 – Gauss’s Law and Electric Fields rev 4.0 3 – Gauss’s Law and Electric Fields 1. Consider an isolated ball of charge –Q, and radius R ball . Figures 1 & 2 show two closed surfaces around or near this charge. (Remember, everything including the surfaces, is 3-dimensional) a) Q: Draw the field lines for this charge on figure 1. b) Q: Based on your picture, is the net flux through surface A positive, negative or zero? c) Q: Based on Gauss’s Law, what is the net flux through surface A? d) P: Use Gauss’s Law to find the magnitude of the electric field at points on surface A. e) Q: Draw the field lines for this charge on figure 2. f) Q: Based on your picture, is the net flux through surface B positive, negative or zero? g) Q: Based on Gauss’s Law, what is the net flux through surface B? h) Q: Is the electric field at points on surface B zero? -Q Figure 1 Surface A, rad. r A -Q Figure 2 Surface B

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Physics 8B 3 – Gauss’s Law and Electric Fields rev 4.0 2. Consider two point charges +Q and –Q, separated by a distance d. Figures 1 & 2 show two closed surfaces around or near these charges. (Remember, everything including the surfaces, is 3-dimensional) a) Q: Draw the field lines for this charge configuration on figure 1. b) Q: Based on your picture, is the net flux through surface A positive, negative or zero? c) Q: Based on Gauss’s Law, what is the net flux through surface A? d)
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3 &acirc;€“ Gauss's Law and Electric Fields -...

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