Current and DC Circuits
PHYS 301 · Module 3
This module connects microscopic charge motion to macroscopic circuits. Students study current, resistance, Ohm's law, resistivity, circuit reduction, and Kirchhoff's rules.
Lessons in this module
Electric current and resistance
Electric current is the flow of charge through a surface. This lesson explains current, current density, drift velocity, resistance, and power.
Ohm's law and resistivity
Ohm's law relates voltage, current, and resistance for ohmic materials. This lesson explains resistance, resistivity, geometry, temperature effects, and non-ohmic devices.
DC circuit analysis
DC circuit analysis uses equivalent resistance, voltage division, current division, and power relationships. This lesson develops systematic methods for resistor networks.
Kirchhoff's rules
Kirchhoff's junction and loop rules allow analysis of complex circuits. This lesson connects the rules to charge conservation and energy conservation.
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