# 4: Conservation of Charge

$$\newcommand{\vecs}[1]{\overset { \scriptstyle \rightharpoonup} {\mathbf{#1}} }$$ $$\newcommand{\vecd}[1]{\overset{-\!-\!\rightharpoonup}{\vphantom{a}\smash {#1}}}$$$$\newcommand{\id}{\mathrm{id}}$$ $$\newcommand{\Span}{\mathrm{span}}$$ $$\newcommand{\kernel}{\mathrm{null}\,}$$ $$\newcommand{\range}{\mathrm{range}\,}$$ $$\newcommand{\RealPart}{\mathrm{Re}}$$ $$\newcommand{\ImaginaryPart}{\mathrm{Im}}$$ $$\newcommand{\Argument}{\mathrm{Arg}}$$ $$\newcommand{\norm}[1]{\| #1 \|}$$ $$\newcommand{\inner}[2]{\langle #1, #2 \rangle}$$ $$\newcommand{\Span}{\mathrm{span}}$$ $$\newcommand{\id}{\mathrm{id}}$$ $$\newcommand{\Span}{\mathrm{span}}$$ $$\newcommand{\kernel}{\mathrm{null}\,}$$ $$\newcommand{\range}{\mathrm{range}\,}$$ $$\newcommand{\RealPart}{\mathrm{Re}}$$ $$\newcommand{\ImaginaryPart}{\mathrm{Im}}$$ $$\newcommand{\Argument}{\mathrm{Arg}}$$ $$\newcommand{\norm}[1]{\| #1 \|}$$ $$\newcommand{\inner}[2]{\langle #1, #2 \rangle}$$ $$\newcommand{\Span}{\mathrm{span}}$$$$\newcommand{\AA}{\unicode[.8,0]{x212B}}$$

• 4.1: Four Questions
The basics of what electric charge is and how it can be stored in, transported across the boundary of, or generated and consumed inside a system.
• 4.2: Conservation of Charge
Different forms of the equation for conservation of net charge.
• 4.3: Physical Circuits and The Lumped Circuit Model
Definition of physical circuits; discussion of the underlying assumptions of the lumped circuit model used to analyze them.
• 4.4: Ohm's "Law" -- A Constitutive Relation
One of the most frequently used constitutive relationships in studying electrical phenomena is referred to as Ohm's Law. This, like every constitutive relationship, is not really a law but a well-worn and useful model for a specific physical phenomenon.
• 4.5: Simple Resistive Circuits
How to solve a simple resistive circuit that satisfies the lumped circuit model, using Ohm's Law and the principle of conservation of charge. Includes worked example.
• 4.6: Problems

This page titled 4: Conservation of Charge is shared under a CC BY-NC-SA 4.0 license and was authored, remixed, and/or curated by Donald E. Richards (Rose-Hulman Scholar) via source content that was edited to the style and standards of the LibreTexts platform; a detailed edit history is available upon request.