\documentclass[10pt]{article}
\usepackage{graphicx, multicol,wrapfig,exscale,epsfig,fancybox,fullpage}
\pagestyle{empty}

\parindent=0pt
\parskip=.1in

\newcommand\hs{\hspace{6pt}}

\begin{document}


\centerline{\bf Lorentz Force and the Work Done on a Rectangular Loop of Current}
\bigskip

A rectangular loop of current-carrying wire has current $I$, length $l$, and width $w$. 

\bigskip
\centerline{\includegraphics[scale=0.9]{splorentzloop}}
\bigskip

The loop is placed at an angle $\theta$ to the horizontal in a uniform magnetic field, where $\vec{B}$ is in the $\hat{z}$-direction.

\bigskip
\centerline{\includegraphics[scale=0.9]{splorentzdiagram}}
\medskip

\begin{enumerate}
\item Find the direction of the force on each piece of the wire.\\
\item Calculate the force on the right side of the wire (where $I$ is into the page).\\
\item Find the net force on the whole wire.\\
\item Calculate the work you need to do to rotate the wire from $\theta=-{\pi \over 2}$ to some angle $\theta_0$.
\end{enumerate}


\vfill
\leftline{\it by Mary Bridget Kustusch \& Corinne Manogue}
\leftline{\copyright 2012 Corinne A. Manogue}
\end{document}