[Tex/LaTex] How to get sans-serif text in beamer with newtxtext

Question

The beamer package uses sans-serif fonts for text and structure. But, if the newtxtext package is used, all contents use serif font.

Here is an MWE:

\documentclass{beamer}
\usepackage{newtxtext}
\begin{document}
\begin{frame}
  \frametitle{Test}
  \begin{itemize}
  \item Item 1
  \end{itemize}
\end{frame}
\end{document}

As newtxtext is a replacement for txfonts, I compare with the same document but using txfonts:

\documentclass{beamer}
\usepackage{txfonts}
\usepackage{lipsum}
\begin{document}
\begin{frame}
  \frametitle{Test}
  \begin{itemize}
  \item \lipsum[4]
  \end{itemize}
\end{frame}
\end{document}

Answer 1

To have the sans serif font as default, simply add \renewcommand{\familydefault}{\sfdefault}

\documentclass{beamer}
\usepackage{newtxtext}

\renewcommand{\familydefault}{\sfdefault}

\begin{document}
\begin{frame}
  \frametitle{Test}
  \begin{itemize}
  \item Item 1
  \end{itemize}
\end{frame}
\end{document}