The two requirements for a strong planetary magnetic field are rapid rotation and a convective interior zone composed of an electrically conductive material. Jupiter's rotational period is slightly less than 10 hours. What type of matter present within Jupiter fulfills the second requirement?

The presence of Liquid metallic hydrogen.

Explanation:

Jupiter is primarily made of this material.

This is a phase of hydrogen where the material behaves like an electrical conductor, it happens due to the high temperature and pressure that take place in Jupiter's hostile environment.

This form of Hydrogen is not present anywhere on our planet.