Energy stored before and after in the capacitor


by Ankitshyani
Tags: capacitor, energy, stored
Ankitshyani
Ankitshyani is offline
#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
Phys.Org News Partner Science news on Phys.org
NASA's space station Robonaut finally getting legs
Free the seed: OSSI nurtures growing plants without patent barriers
Going nuts? Turkey looks to pistachios to heat new eco-city
tiny-tim
tiny-tim is offline
#2
Jun16-09, 09:44 AM
Sci Advisor
HW Helper
Thanks
tiny-tim's Avatar
P: 26,167
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
Ankitshyani is offline
#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
tiny-tim is offline
#4
Jun17-09, 03:05 PM
Sci Advisor
HW Helper
Thanks
tiny-tim's Avatar
P: 26,167

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.


Register to reply

Related Discussions
Energy stored in a capacitor Classical Physics 4
Energy Stored in a Capacitor Introductory Physics Homework 1
Energy stored on a capacitor General Physics 6
Energy Stored on a Capacitor Introductory Physics Homework 3
Energy stored on a capacitor Introductory Physics Homework 1