Electricity & Magnetism
RC Time Constant
Time constant for RC circuit charging/discharging.
Variables
τs
Time constant
Characteristic time
RΩ
Resistance
Circuit resistance
CF
Capacitance
Circuit capacitance
Derivation
From differential equation: V(t) = V₀e^(-t/RC).
Your notes
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Common questions
What is the RC Time Constant formula?
RC Time Constant is written τ= RC. Time constant for RC circuit charging/discharging. It belongs to Electricity & Magnetism, under Capacitance.
What are the units in τ= RC?
In SI units, τ is time constant, measured in s; R is resistance, measured in kg·m²/(A²·s³); C is capacitance, measured in A²·s⁴/(kg·m²).
How is the RC Time Constant formula derived?
From differential equation: V(t) = V₀e^(-t/RC). The result is τ= RC.