Whats the principle of superposition

[spock9000]

Hello

I would appreciate if someone can refresh my mind with the principle of superposition..

 

[SHISHKABOB]

http://en.wikipedia.org/wiki/Superposition_principle

?

 

[spock9000]

lol yeah wikipedia was my first website but i didnt understood that explanations i already found an easy explanations.. thanks anyway..

Superposition Principle

The Superposition Principle states that net electric field produced at any point by a system of charges is equal to the vector sum of all individual fields, produced by each charge at this point

http://physics-help.info/physicsguide/electricity/electric_field.shtml

 

[Khashishi]

The superposition principle is a property of a linear system/function/algebra. If the function f is linear, then if
A=f(a)
B=f(b)
then
A+B=f(a+b)
This is the superposition principle and it works for any sort of linear or approximately linear problem. Electromagnetism and quantum mechanics are linear. More specifically, the electric field is a linear function of the charge distribution.
\textbf{E}(\vec{x})=f(\rho(\vec{x}))
So, if you know the electric field for two charge distributions, you can easily figure out the electric field for the combined charge distribution.