Equations
RC time constant
Electricity and magnetism · id rc_time_constant
\tau = R C
| Symbol | Quantity | Unit | Meaning | Usual range |
|---|---|---|---|---|
tau | time constant | s | Time to charge to about 63% | 1e-12 to 1e+07 |
R | resistance | ohm | Resistance in the circuit | 0.001 to 1e+09 |
C | capacitance | F | Capacitance | 1e-15 to 10 |
Assumptions
- Single resistor and capacitor in series
Valid when
- No extra conditions.
Found by
Questions with these words retrieve this equation: RC circuit, time constant, charging, discharging, capacitor, resistor.
Source
OpenStax University Physics Volume 2, Chapter 10 (reference; entry written by the project). License: MIT. Entry confidence: 0.99.