AP PHYSICS 2Ohm's Law & Resistance
Explore Ohm's Law stating that voltage across a conductor is proportional to current: V = IR, where R is resistance measured in ohms. Understand how resistance depends on material properties (resistivity ρ), length, and cross-sectional area: R = ρL/A. Calculate power dissipation using P = IV = I²R = V²/R. Analyze how temperature affects resistance, and apply Ohm's Law to solve circuit problems involving series and parallel resistor combinations.