A regular tetrahedron has four equilateral-triangular faces. A point charge Q is placed exactly at the centre of one face.The electric flux through any one of the other three faces is:
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A regular tetrahedron has four equilateral-triangular faces. A point charge Q is placed exactly at the centre of one face.The electric flux through any one of the other three faces is:

G1 Physics · Accepted Answer

Reflect the tetrahedron across the face containing Q. The two tetrahedra form a symmetric triangular bipyramid with Q inside. Its six outer triangular faces are equivalent. Total flux: Φ_total = Q/ε₀. Therefore, Φ_face = Q/(6ε₀).