Math & Science ⇒ Integration issue

[jono90one]

Hi,
I'm new to latex and after ages of reasearching i can't seem to find out how to have an even format, heres the picture:

integration.png (3.51 KiB) Viewed 1576 times

Now the circle intergral is somewhat too small. Is there a way to make it larger?

Here is the line:
{\oint} \vec{E} \cdot \mathrm{d}\vec{A} &=& \frac{Q}{\epsilon_{0}}


Edit by localghost: Preferably no external links (see Board Rules). Attachments go onto the forum server where possible.

[gmedina]

Hi,

please do always accompany your posts (according to the Board Rules) with complete, compilable and minimal code; in other words, with a minimal working example.

In your case, you could use \displaystyle; compare the following expressions:

Code: Select all

\documentclass{article}
\usepackage{amsmath}

\begin{document}

$ \oint \vec{E} \cdot \mathrm{d}\vec{A} = \frac{Q}{\epsilon_{0}}$

$\displaystyle \oint \vec{E} \cdot \mathrm{d}\vec{A} = \frac{Q}{\epsilon_{0}}$

\end{document}

As a side note, it seems that you are using eqnarray; this environment shouldn't be used anymore for a number of reasons: Avoid eqnarray! (the document explains the reasons to avoid eqnarray and the alternative environments to be used).