Please find the total flux passing through the shaded region?
Ans is Q/12ϵ
Ans is Q/12ϵ
You may have met B defined as mag field strength.
The flux through the shaded side is
I credit @Jane for this approach. She answered your similar question with an approach that I admire. Unfortunately, I think she misunderstood that question, thinking it was about a charge at a corner of a cube. It wasn't. But her approach to solving that question as she understood it inspires my answer to this question.
I have pasted her answer here and have changed its color to blue.
To be clear, the situation Jane analysed could be illustrated by the figure above if one of the charges were deleted.
I will apply this analysis to one of the 2 charges in this question and then show that it can also be applied to the other charge and the affect is putting a
I will take also the liberty of attempting to add to the explanation in Jane's paragraph beginning "But, out of the 6 planes ...".
Since Jane assumed the charge is at a corner of the cube, the charge is part of 3 of the planes of the cube. Therefore there would not be any flux passing through those 3 planes. Only the other 3 sides would have flux from the one charge being considered by Jane's analysis.
Now, to apply this to this question. The 2nd charge also has charge
Therefore, the flux through the shaded side is