Question #285498

A flat circular disk of radius "a" is placed inside a uniform external electric field E' pointing in positive z direction. calculate the net electric flux through the disk.

1
Expert's answer
2022-01-09T18:22:30-0500

Assuming the plane of the disk is horizontal


ϕ=E.dA\phi=\int\>E.dA


Since electric field is uniform


ϕ=EACosθ\phi=EA\>Cos\>\theta


θ=0°\theta=0°


ϕ=EA\phi=EA

But A=πa2A=\pi\>a^2


ϕ=πEa2\phi=\pi\>Ea^2


Where E=E= Electric field

ϕ=\phi= Electric flux


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