Electromagnetic Field Theory
A fan blade of length 2R rotates in a time period T in a magnetic field B. The induced voltage in the blade is proportional to
Gauss’s law states that total electric flux through any surface is equal to the total charge enclosed by surface.
An electric flux line is an imaginary path or a line drawn in such a way, that its direction at any point is the direction of electric field at that point.
Gauss’s static that divergence of D = ρu.
For a uniform long charged line with l1 c/m the electric field intensity E is given as E = ρL/(π ε0.r).