Hey. So if I have a condenser, where the electric field between the plates is equivalent to 50kV/m, the electric flux density D= ε0*50kV/m. If I insert a dielectic between the plates, the electric field will decrease to 10kV/m, and kappa (the relative permittivity) equals 5. So, will the flux density D = ε0κ*10kV/m, or D = ε0κ*50kV/m? The first one makes more sense to me, but I am unsure.