Inductance (Physics)

Recall cards on inductance. Mutual inductance: the henry, the M = N Phi / I definition, its symmetry and geometry dependence, and the induced emf epsilon = -M dI/dt. Self-inductance: Phi = LI, the self-induced emf -L dI/dt, its Lenz's-law polarity, the inductor as a circuit element, and the solenoid formula. Energy in a magnetic field: U = (1/2) L I^2, the energy density B^2/(2 mu0), and inductor power. RL circuits: the asymptotic rise and decay of current, the time constant L/R, the 63% rule, and the initial and steady-state conditions. LC oscillations: omega = 1/sqrt(LC), the electric-to-magnetic energy exchange, the charge and current solutions and their 90-degree phase, and the mass-spring analogy. RLC series circuits: damped oscillations, the governing differential equation, and the underdamped, critically damped, and overdamped regimes.