A line of charge refers to a distribution of electric charge that is concentrated along an infinitely long, straight line.
Sheet of Charge: A sheet of charge refers to a distribution of electric charge that is concentrated on an infinitely large, flat surface.
Linear charge density (ฦ): Linear charge density is a measure of how much electric charge exists per unit length along a line or wire.
Electric Field: Electric field refers to the region around an electrically charged object where another charged object experiences an electric force.