Net electric flux through torus

[dtesselstrom]

Homework Statement

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

Homework Equations

net flux= E*A I believe is needed

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.

 

[andrevdh]

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.

 

[laduch]

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~