For 10 points, name this field that has units of force per unit charge and is symbolized by the letter E.
This quantity is responsible for changes in refractive indices proportional to the square of this quantity in the Kerr effect. A vector that describes the directional energy flux density is equal to the magnetic field times this quantity and is called the Poynting vector. Drift velocity is equal to this quantity times electron mobility. A dipole experiences a torque equal to charge times separation times this quantity. This quantity is zero within a conductor.  The integral of this quantity dotted with area over a closed surface is proportional to the charge enclosed by Gauss'  law. For 10 points, name this field that has units of force per unit charge and is symbolized by the letter E.
This quantity is responsible for changes in refractive indices proportional to the square of this quantity in the Kerr effect.
electric field [accept E before it is read]