Ohm's Law & Factors Affecting Resistance | Current Electricity Lecture 3 | Class 12 Physics

Ohm's Law and Factors Affecting the Resistance of a Wire | Current Electricity, Lecture 3 (Class 12 Physics) In this lecture: • Statement of Ohm's law: V = IR • Resistance and its SI unit (ohm) • V–I graph of ohmic conductors • Factors affecting resistance: length, cross-sectional area, nature of material and temperature • Derivation of R = ρL/A and resistivity (ρ) By Kamran Afsar Khan, Lecturer in Physics, Govt College Peshawar For online classes, WhatsApp: 03339077599 Subscribe to my YouTube channel "Kamran Afsar Khan":    / @kamranustaadustaad   #OhmsLaw #Resistance #CurrentElectricity #Class12Physics #FScPhysics #KPKBoard #MDCAT #KamranAfsarKhan