PHYS 251 Chapter Notes - Chapter 22.1-22.5: Electric Potential, Electric Light, Electric Field
Document Summary
Current: the motion of charges through a material. Charge carriers: the charges that more in a current. The potential difference creates an electric field that drives the current in a wire. Conservation of current: the current is the same at all points in a current-carrying wire. The current leaving a lightbulb is exactly the same as the current entering a lightbulb. The current in a metal consists of electrons moving from low electric potential to high electric potential, opposite the electric field. Current = the rate at which charge moves through a wire. Si unit for current = 1 ampere = 1 a = 1c/s. For a steady (cid:272)urre(cid:374)t, the total a(cid:373)ou(cid:374)t of (cid:272)harge deli(cid:448)ered (cid:271)y (cid:272)urre(cid:374)t i duri(cid:374)g ti(cid:373)e i(cid:374)ter(cid:448)al t is. Kir(cid:272)hhoff"s ju(cid:374)(cid:272)tio(cid:374) la(cid:449): the sum of the currents into a junction equals the sum of currents leaving. The i(cid:374)(cid:374)er (cid:449)orki(cid:374)gs of a (cid:271)attery a(cid:272)t like a (cid:862)(cid:272)harge es(cid:272)alator(cid:863)
