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Net electric flux through torus

1. Homework Statement
What is the net electric flux through the torus (i.e., doughnut shape) of the figure



2. Homework Equations

net flux= E*A I believe is needed

3. The Attempt at a Solution
I don't know how to do this problem at all. I feel like I don't have enough information to calculate the answer. Any advice as how to start this problem because I don't have the radius of the objects so how can I figure out the area.
 

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Answers and Replies

andrevdh
Homework Helper
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Use Gauss's law. The enclosed charge is - 1 nC if you choose the torus as the closed surface. It is a closed surface since it has an outer and inner surface and one cannot pass from the one to the other.
 
3
0
Use Gauss's law. The enclosed charge is - 1 nC if you choose the torus as the closed surface. It is a closed surface since it has an outer and inner surface and one cannot pass from the one to the other.
I had the same problem! you are right! thanks~
 

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