# Homework Help: Numerical based on 3 parallel plates -Find the charge problem

1. May 20, 2012

### aashishrockzz

Plz help-Numerical based on 3 parallel plates -Find the charge problem

Q} Three identical metal plates with large surface areas are kept parallel to each other.The leftmost plate is given a charge Q and the rightmost plate a charge -Q and the middle one remains neutral.Find the charge appearing on the outer surface of rightmost plate.

Sir plz help me with this numerical.
The answer is -Q/2 but i am not able to understand the concept..

Thankyou

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Last edited: May 20, 2012
2. May 20, 2012

### tiny-tim

welcome to pf!

hi aashishrockzz! welcome to pf!
nooo

the question says "the rightmost plate a charge -2Q "!

3. May 20, 2012

### aashishrockzz

ya exactly

4. May 21, 2012

### tiny-tim

certainly

what will the charges be on all the other surfaces?

why do you think the two outermost surfaces have those particular charges?​

5. May 21, 2012

### aashishrockzz

i dont know anything about all this...

Last edited by a moderator: May 21, 2012
6. May 21, 2012

### Zubeen

well .... this question can be easily solved if you just use Gauss theorem.

Last edited by a moderator: May 21, 2012
7. May 21, 2012

### aashishrockzz

I will really be helped !

Last edited by a moderator: May 21, 2012
8. May 21, 2012

### micromass

The rules of this site are that you have to make an effort in solving the question. We are not here to solve the question for you.

If you don't make an effort, then this thread will be deleted.

9. May 22, 2012

### aashishrockzz

ok.... sorry for that...
my problem is i am not able to start this question....