A charge q is placed at the center of a cubical box of side a with the top open. The flux of the electric field through one of the surface of the cubical box is
Step 1: Given data
Cubical box:
A diagram to represent the cubical box:
Step 2:
On the basis of the question:
Because the charge is placed at the center of the box.
So,
Now, if the box is complete then the total flux passing through it will be
But it has one face missing so,
flux
Hence,