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Flux is a mathematical concept which can be interpreted physically. In case of an arbitrary surface, electric field is calculated by dividing imaginary surface into small elements of surface. Each element of surface is considered as a flat surface and is represented by a vector. The formulas become "obvious" dare I say. However, it took a lot of effort to truly understand that: Flux is the amount of "something" (electric field, bananas, whatever you want) passing through a surface. The total flux depends on strength of the field, the size of the surface it passes through, and their orientation.

To gain a rough sense of the total net flow, or flux, of a vector field F through a surface S, we add all such dot products F n. Of course, to add "all" of the dot products at every point on the surface means to take an integral. Thus, the flux of a vector field F through a surface S is given by ∬𝐅⋅𝐧 . Ë

Magnetic Flux Formula Questions: 1) A planar surface has an area of 1 m 2, if a magnetic field crosses with an angle of 30° to it, and has B= 2 T. What is the magnetic flux? Answer: From the formula of the magnetic flux, Φ = B A cos(θ) = 2 T * 1 m 2 * cos(30°) Φ = 1 T mProblem : Find the area of a circle with radius a. Solution to the problem: The equation of the circle shown above is given by x 2 + y 2 = a 2 The circle is symmetric with respect to the x and y axes, hence we can find the area of one quarter of a circle and multiply by 4 in order to obtain the total area of the circle.If kVp changes, use kVp formula first: (mr1/mr2) = (kVp1^2/kVp2^2) then plug the new mR back into the ESE formula to get the new mR2. If dealing with multiple shots, add up the ESE for each of the shots in the end with the appropriate rate times their mAs.