A charge q is located at the centre of a cube. The electric flux through any one face is:
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A charge q is located at the centre of a cube. The electric flux through any one face is:

G1 Physics · Accepted Answer

Step 1: Total closed-cube flux = q/ε₀. Step 2: All six faces are equivalent by symmetry, so flux per face = q/(6ε₀). Step 3: Since q/(6ε₀) = 4πq/[6(4πε₀)], answer (B).