Here's the question you clicked on:
sharish
how do you calculate flux?
gauss's law is what you want. it is very complex, but in it's simplest form the equation is: \[\int\limits_{}^{} E * dA = \frac{Q_{enc}}{\epsilon_0}\]
electric flux can be calculated using GUASS LAW,whereas magnetic flux can be caculated using Ampere,s law
(EMF) (\[DeltaT\)/ the number of loops in the coil
Actually, the definition of flux is mathematical and independent of electromagnetism laws (for instance Gauss' law). It is defined as integral operator that acts on a vector field, or the integral of a quantity named flux density. \[\text{flux}=\int\limits_\text{S} \vec{V}\cdot\hat{n}dA\] where S is the surface which you're analysing the flux density and n is the unity vector perpendicular to the surface of integration and V is the vector field.