The net electric flux due to a uniform electric field of 3 10^3 1 NC ⁻¹ through a cube of side 20 ~cm oriented such that its faces are parallel to the coordinate planes is

Step-by-step solution

Uniform electric field, E =3 10^3 i N / C side of cube, a=20 ~cm =0.20 ~m Four face makes the angle between area vector and electric field is 90^ . =( EdA 90) 4=0 One face makes the angle between area vector and electric field is 0^ aligned & ₁= E A 0 & = EA aligned Other face makes the angle between area vector and electric field is 180^ ₂= EA 180=- EA The net electric flux is aligned & _ net = ₁+ ₂ & = E A- EA =0 aligned