# Vector field flux

1. Mar 18, 2013

### michael892

Given is vector field
$$\overrightarrow{C}(\overrightarrow{r})=r$$
calculate flux
$$\Phi =\int_{S} \overrightarrow{C}\cdot d\overrightarrow{A}$$
through sphere S with beginning in [0,0,0] and r=1

2. Mar 18, 2013

### tiny-tim

welcome to pf!

hi michael892! welcome to pf!

show us what you've tried, and where you're stuck, and then we'll know how to help!

3. Mar 18, 2013

### michael892

i know i had to calculate surface integral but i didnt have multivariable calculus yet

4. Mar 19, 2013

### tiny-tim

hih michael892!

(just got up :zzz:)
you won't need calculus, it's not complicated enough for that

what is r.dn on a sphere of radius r ?

(where n is the outward normal unit vector)