# give equation making total capacitance the subject?

• Feb 23rd 2009, 05:12 AM
decoy808
give equation making total capacitance the subject?
what is the equation for making the total capacitance the subjet?

http://img214.imageshack.us/img214/1540/cap.th.png

many thanks :)
• Feb 23rd 2009, 05:53 AM
u2_wa
Let $C'$ be the total capacitance.
Capacitance of capacitors in parallel $= 2C$
now: $C' = 1/(2C) + 1/C = 1/C'$
$C' = 3/2C$
$(2C')/3=C$