Time Constant

Time Constant

The time required for a current turned into a circuit under a steady electromotive force to reach to (e-1)/e or 0.632 of its final strength (where e is the base of natural logarithms)
specifically the ratio of the inductance of a circuit in henry to its resistance in ohms
the relaxation time in the discharge of a capacitor that is equal to the product of the resistance in ohms of the discharging circuit and the capacity in farads of the condenser

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