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Energy stored before and after in the capacitor

by Ankitshyani
Tags: capacitor, energy, stored
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Ankitshyani
#1
Jun16-09, 06:15 AM
P: 2
1. The problem statement, all variables and given/known data

A 1microf capacitor is charged to 20V and is connected in parallel to a 2microf capacitor charged to 16V. how much energy is stored before and after connection?

please anyone can help me with this problem
Thanks in advance

2. Relevant equations



3. The attempt at a solution
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tiny-tim
#2
Jun16-09, 09:44 AM
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P: 26,148
Hi Ankitshyani! Welcome to PF!

(have a mu: )

What is the usual formula for energy of a capacitor?

Show us how far you get, and where you're stuck, and then we'll know how to help!
Ankitshyani
#3
Jun17-09, 02:54 PM
P: 2
hi there,

how are you....the formula for energy stored in the capacitor is: W = 1/2 C V .....

thanksss

tiny-tim
#4
Jun17-09, 03:05 PM
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tiny-tim's Avatar
P: 26,148
Energy stored before and after in the capacitor

Quote Quote by Ankitshyani View Post
hi there,

how are you....the formula for energy stored in the capacitor is: W = 1/2 C V .....

thanksss
No, CV is the charge of a capacitor

go back to your book and study it again.


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