charging the capacitor formula;
Q=Q max (1-e ^-t/RC)
Q=qmax= 0.75
solve for t
A 9-Volt battery is used to charge a 280 mF capacitor over a 81 Ohms resistance.
How long will it take for the capacitor to reach 75% of its maximum charge?
What formula is relevant?
3 answers
So the Voltage is irrelevant?
Why wouldn't you use this formula?
Q=Qmax*e^(-t/RC)
Q=Qmax*e^(-t/RC)
1 answer