time constant

time constant

noun Electricity.
the time required for a changing quantity in a circuit, as voltage or current, to rise or fall approximately 0.632 of the difference between its old and new value after an impulse has been applied that induces such a change: equal in seconds to the inductance of the circuit in henries divided by its resistance in ohms.

Origin:
1890–95
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Time constant is always a great word to know.
So is ninnyhammer. Does it mean:
a fool or simpleton; ninny.
a scrap or morsel of food left at a meal.
Collins
World English Dictionary
time constant
 
n
electronics the time required for the current or voltage in a circuit to rise or fall exponentially through approximately 63 per cent of its amplitude

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