Consider a series RC circuit shown below:
The voltage across the capacitor is given by:
v(t) = v(∞) + { v(0+) - v(∞)}e-t/τ
where, τ = time constant of the circuit
The ratio of stored energy in the capacitor in the time constant 'τ' to the steady-state value is:
1
36.3 %
2
40.5 %
3
13.17 %
4
63.7 %