Rise of Current in Series LR Circuit (i = (E/R)(1 - e^{-Rt/L}))

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i = (E/R)(1 - e^{-Rt/L})

What each symbol means

SymbolWhat it stands for
LInductance (H)
RResistance (Ω)
tTime after closing switch (s)
Battery emf (V)

When to use this

Ideal inductor (no resistance), DC source switched at t=0, initial i=0.