Inductance & Circuit Oscillations Explained | Chapter 30 of University Physics
Inductance & Circuit Oscillations Explained | Chapter 30 of University Physics Chapter 30 introduces the concept of inductance—how changing currents and magnetic fields interact to store energy—and examines the dynamic behavior of RL, LC, and LRC circuits. You’ll see how mutual and self-inductance drive real-world applications from smoothing filters to oscillators. Watch the full video summary here for step-by-step derivations and demonstrations. Mutual Inductance When the current in one coil changes, it induces an emf in a nearby coil. This mutual inductance M depends on coil geometry and core material: Emf induced in coil 2: ℰ₂ = –M·(di₁/dt) Emf induced in coil 1: ℰ₁ = –M·(di₂/dt) Definition: M = (N₂·Φ₂)/i₁ = (N₁·Φ₁)/i₂ Self-Inductance & Inductors A changing current in a coil induces an emf in itself, characterized by the self-inductance L: ℰ = –L·(di/dt) L = N·Φ/i , where N is the turn count and Φ the magnetic flux per turn Inductors resis...