- #1

- 63

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## Homework Statement

http://media.collegeboard.com/digitalServices/pdf/ap/ap14_frq_Physics_C-E-M.pdf

#3 c ii)

## Homework Equations

## The Attempt at a Solution

##\oint E\cdot dA = \dfrac{q_{encl}}{\epsilon_0}##

To find q_encl would this be correct;

## q_{encl} = \int \dfrac{-\beta}{r^2}\cdot e^{-r/\alpha}\cdot (4\pi r^2)dr##

then integrating that, and substituting it into the expression for q_{encl}.

##E = \dfrac{q_{encl} }{\epsilon_0 \cdot 4\pi r^2}##