- #1
jegues
- 1,097
- 3
Homework Statement
No problem, I just have a confusion about a certain concept.
Homework Equations
The Attempt at a Solution
I'm confused as to how they draw the result,
[tex]\oint_{C} \vec{E} \cdot \vec{dl} = E_{1t}\Delta l - E_{2t}\Delta l = 0[/tex]
You don't really need to do the integration since,
[tex]\Delta l[/tex]
is so small. Thus the result must be,
[tex]E_{net} \Delta l[/tex]
But why is it such that,
[tex]E_{net} = E_{1t} - E_{2t}?[/tex]
It looks as though they are pointing in the same direction in the figure.
Can someone explain? Am I mixing some things up?
Thanks again!