APFIVE Integral Form of Magnetic Flux
Under which of the following conditions is it necessary to calculate magnetic flux using the integral form $$\Phi_{B}=\int \vec{B} \cdot d \vec{A}$$?
A
When the magnetic field is perfectly uniform and the surface is completely flat.
B
When the magnetic field is non-uniform across the surface or the surface is not flat.
C
When calculating the flux through a surface with infinitesimal area in a constant magnetic field.
D
When the magnetic field lines are always perpendicular to the surface at every point.
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