(a) Define electric flux and write its SI unit. (b) Use Gauss\'s la...

Question

(a) Define electric flux and write its SI unit. (b) Use Gauss\'s law to obtain the expression for the electric field due to a uniformly charged infinite plane sheet of charge.

Accepted Answer

(a) Electric Flux

Definition:
Electric flux through a surface is defined as the total number of electric field lines passing normally through that surface.

Mathematical form:
φ = ∫ E·dA = ∫ E dA cosθ

where θ is the angle between E and area vector dA.

SI Unit:
N·m²/C or equivalently V·m

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