Area vector with examples & flux vector equation | Electric fields & charges | Khan Academy

Let's explore how and why we treat area as a vector. The direction of area vector is always perpendicular to it. For open surfaces, we have to arbitrarily choose between two perpendiculars, but for closed surfaces, we choose the outward direction as our standard. This helps us define the flux to be the dot product of electric field and the area.

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Created by Mahesh Shenoy