The RC time constant, also called tau, the time constant (in seconds) of an RC circuit, is equal to the product of the circuit resistance (in ohms) and the circuit capacitance (in farads), i.e. [seconds] Charging toward applied voltage (initially zero voltage across capacitor, constant V0 across resistor and capacitor together) Discharging toward zero from initial voltage (initially V0 across capacitor, constant zero voltage across resistor and capacitor together)
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| - ثابت الزمن RC (ar)
- Costante di tempo (elettrotecnica) (it)
- RC time constant (en)
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| - ثابت الزمن RC، الذي يدعى أيضا ، ثابت الزمن (بالثواني) لدارة RC، يساوي نتاج مقاومة الدارة (أوم) ودقة السعة (فاراد)، أي:هو الوقت اللازم لشحن المكثف، من خلال المقاومة، من جهد الشحنة الأولي من صفر إلى ≈63.2 في المئة بتطبيق قيمة الجهد DC، أو لتفريغ مكثف من خلال المقاومة نفسها إلى ≈36.8 في المئة لقيمة الجهد الأولي. وتستمد هذه القيمة من ثابت رياضي e، وتحديدا , المتعلقة بالجهد عبر المكثف مقابل الوقت: الشحن نحو الجهد المطبق التفريغ نحو الصفر من الجهد الأولي (ar)
- The RC time constant, also called tau, the time constant (in seconds) of an RC circuit, is equal to the product of the circuit resistance (in ohms) and the circuit capacitance (in farads), i.e. [seconds] Charging toward applied voltage (initially zero voltage across capacitor, constant V0 across resistor and capacitor together) Discharging toward zero from initial voltage (initially V0 across capacitor, constant zero voltage across resistor and capacitor together) (en)
- In un circuito RC la costante di tempo è una misura del tempo di risposta caratteristico del circuito. Il suo inverso è proporzionale alla frequenza di taglio.Il valore di questa costante si ottiene come prodotto della resistenza e della capacità elettrica del circuito: , se R viene espresso in ohm e C in farad, risulta espresso in secondi. La costante di tempo è collegata tramite le seguenti equazioni alla frequenza di taglio fc (un parametro alternativo dei circuiti a corrente continua), , oppure, equivalentemente, , Alcune equazioni condizionali: Altre equazioni utili sono: (it)
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| - ثابت الزمن RC، الذي يدعى أيضا ، ثابت الزمن (بالثواني) لدارة RC، يساوي نتاج مقاومة الدارة (أوم) ودقة السعة (فاراد)، أي:هو الوقت اللازم لشحن المكثف، من خلال المقاومة، من جهد الشحنة الأولي من صفر إلى ≈63.2 في المئة بتطبيق قيمة الجهد DC، أو لتفريغ مكثف من خلال المقاومة نفسها إلى ≈36.8 في المئة لقيمة الجهد الأولي. وتستمد هذه القيمة من ثابت رياضي e، وتحديدا , المتعلقة بالجهد عبر المكثف مقابل الوقت: الشحن نحو الجهد المطبق التفريغ نحو الصفر من الجهد الأولي (ar)
- The RC time constant, also called tau, the time constant (in seconds) of an RC circuit, is equal to the product of the circuit resistance (in ohms) and the circuit capacitance (in farads), i.e. [seconds] It is the time required to charge the capacitor, through the resistor, from an initial charge voltage of zero to approximately 63.2% of the value of an applied DC voltage, or to discharge the capacitor through the same resistor to approximately 36.8% of its initial charge voltage. (These values are derived from the mathematical constant e: and .) The following formulae use it, assuming a constant voltage applied across the capacitor and resistor in series, to determine the voltage across the capacitor against time: Charging toward applied voltage (initially zero voltage across capacitor, constant V0 across resistor and capacitor together) Discharging toward zero from initial voltage (initially V0 across capacitor, constant zero voltage across resistor and capacitor together) (en)
- In un circuito RC la costante di tempo è una misura del tempo di risposta caratteristico del circuito. Il suo inverso è proporzionale alla frequenza di taglio.Il valore di questa costante si ottiene come prodotto della resistenza e della capacità elettrica del circuito: , se R viene espresso in ohm e C in farad, risulta espresso in secondi. In pratica è il tempo richiesto per caricare il condensatore, attraverso il resistore, al 63,2 % della sua capacità di carica totale; oppure per scaricarlo al 36,8 % della sua differenza di potenziale (in volt). Questi valori vengono derivati dalla costante matematica e, in particolare si ha La costante di tempo è collegata tramite le seguenti equazioni alla frequenza di taglio fc (un parametro alternativo dei circuiti a corrente continua), , oppure, equivalentemente, , Alcune equazioni condizionali: (fc in Hz) = 159155 / (τ in μs)(τ in μs) = 159155 / (fc in Hz) Altre equazioni utili sono: tempo di salita (20 % to 80 %) tempo di salita (10 % to 90 %) (it)
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