Resistivity and Resistance

This study guide covers current, resistance, and Ohm's Law, including current density, resistivity, resistors in series and parallel, and Ohmic vs. non-Ohmic devices. It also explains power and energy in circuits, focusing on calculating electrical power. Finally, it discusses non-ideal batteries and EMF, emphasizing the relationship between EMF, terminal voltage, and internal resistance. The guide includes practice questions and a final exam focus section with high-priority topics, common question types, and last-minute tips.