Ф2 = E2 L² is the electric flux through the cube face in the plane z = 0.
What exactly are electric flux and unit?
given ,
edge length = L
Area of each surface = L²
Ф = E . A
= E . A Cos θ
Φ1 = E1 A Cosθ
Φ1 = E1 L²
Similarly we get
Ф2 = E2 L²
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