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In a region of space the electric field ...

In a region of space the electric field in the `x`-direction and proportional to `x`i.e., `vec(E )=E_(0)xhat(i)`. Consider an imaginary cubical volume of edge a with its parallel to the axes of coordinates. The charge inside this volume will be

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The idea behind this question is that we have to calculate the total electric flux of the field `vec(E)=vec(E)_(0)x hati` through this cube and have to make it equal to `(q)/(epsilon_(0))` Then q will be calculated.
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