When the camera flash goes off, batteries immediately start to recharge flash's capacitor, that stores electric charge provided by the following.
Q(t) = Q0(1 - e-t/a)
The maximum charge capacity is Q0 and t is measured in seconds.
(a) Determine inverse of this function.
Describe its meaning.
This provides us time t with respect to maximum charge capacity Q0.
This provides us time t essential to get the given charge Q.
This provides us charge Q obtained within the given time t.
(b) How long it takes to recharge capacitor to 92% of capacity if a = 2?