given the equation on amount of electrical charge Q ;
dQ/dt + (1/RC)Q=E/R
assuming E=30exp(-3t) C=0.1 R=10 and no initial charge on capacitor

i have complete it expression : Q(t)=-3/2exp(-3t) + 3/2exp(-t)

how to find the time when charge on the capacitor is maximum.

Question

given the equation on amount of electrical charge Q ;
dQ/dt + (1/RC)Q=E/R  
assuming E=30exp(-3t) C=0.1 R=10 and no initial charge on capacitor 

i have complete it expression : Q(t)=-3/2exp(-3t) + 3/2exp(-t)

how to find the time when charge on the capacitor is maximum.

anonymous · Answer

Hi,
Using Math, the time will be Infinity.

anonymous · Answer

and it's completely similar for all capacitors when we want to solve related equations.

But practically it's different.

ganeshie8 · Answer

http://www.wolframalpha.com/input/?i=maximize+-3%2F2exp%28-3t%29+%2B+3%2F2exp%28-t%29

er.mohd.amir · Answer

use calculas

anonymous · Answer

Calculus!!!!!! 
It's a good idea. :)

er.mohd.amir · Answer

its problam of max. and min

michele_laino · Answer

here there are two opposite tendencies: the first one is the charging behaviour of capacitor under the action of an external generator, the second one is the discharging behaviour under the same action of such generator, since it provides a decreasing external voltage, across of such capacitor. That  is why the existence of a point of maximum

anonymous · Answer

@ganeshie8 I sent you a message, please respond!