Question

To calculate the electric flux through a surface of arbitrary shape you need to:

a. multiply the total area of the surface by the average magnitude of the electric field at the surface.

b. split the surface into small areas, and then add up the product of the perpendicular component of the electric field through each small area times the small area.

c. split the surface into small areas, and then add up the product of the electric field times the small area.

Answer 1

Flux=$\int$E.ds,

Where E is the electric field and ds is the small area and we take their dot product which means that it is the product of the perpendicular component of electric field and the small area. Integrating it simply means adding them up. So option b is the correct option