20.4 RL Circuits

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RL Circuits

RL CIRCUITS
Inductors • Inductors oppose the rate of change of the current.

   ε = -L ΔI / Δt

   I(t) = ε / R (1 - e-t / τ)        τ = L / R
PEL • An inductor stores energy in its magnetic field.

   PEL = ½ L I2