time constant

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English[edit]

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Noun[edit]

time constant (plural time constants)

  1. (mathematics) A characteristic of an exponential function, represented by τ in the function:
     y(t) \ = \ y_o e^{-t / \tau} \ .
  2. (physics) The time in which a physical system's response to a step-wise change in an external variable reaches approximately 63% of its final (asymptotic) value.

Translations[edit]