A vector quantity that allows Gauss's law to be written in terms of free charge alone as
in a dielectric having a bound charge
where P is the electric polarization. D is sometimes called the electric displacement.
Dielectric, Dielectric Constant, Electric Field, Electric Polarization, Electric Susceptibility, H
References
Griffiths, D. J. "The Electric Displacement." §4.3 in Introduction to Electrodynamics, 3rd ed. Englewood Cliffs, NJ: Prentice-Hall, pp. 152-156, 1998.
Purcell, E. M. "The Field of a Charge in a Dielectric Medium, and Gauss's Law." §10.11 in Electricity and Magnetism, 2nd ed. New York: McGraw-Hill, pp. 379-382, 1985.
