In hollow rectangular waveguides, waves named for this quantity have the lowest non-zero cutoff frequency in the one-zero mode. For a point charge moving at a uniform relativistic velocity, this quantity becomes “pancake-shaped” by bunching up in the transverse direction. The density of energy stored by this quantity is given by permittivity (10[1])over 2 (10[1])times this quantity (-5[1])squared. The component of this quantity parallel to the surface is constant across a boundary. That derivation uses that (-5[1])the flux of this quantity through a surface is proportional only to enclosed (10[1])charge density according to Gauss’s law. The negative line integral of this quantity gives the scalar potential. For 10 points, what vector quantity is measured in newtons per coulomb and created by electric charges? ■END■ (10[2])