The differences between a magnet and a current-carrying solenoid are as follows:
\[
\begin{array}{|l|l|}
\hline
\textbf{Magnet} & \textbf{Current Carrying Solenoid} \\
\hline
\text{Produces a magnetic field naturally.} & \text{Produces a magnetic field when current flows through it.} \\
\hline
\text{Has fixed north and south poles.} & \text{Has magnetic poles that depend on the current direction.} \\
\hline
\text{The magnetic field is permanent.} & \text{The magnetic field can be turned on or off.} \\
\hline
\end{array}
\]