In this work, a different way to study the moment of inertia of a body in rotation is shown. It is described an experiment that allows to establish how the inertia of a plate depends on its mass and geometry, where parameters like the exponents and the constant of the traditional equation of the moment of inertia of a plate are determined, starting from the measurements of the electric current. For this purpose it was chosen four plates of different masses, which two of them have the same dimensions, while for the other pair of plates one has the side twice larger than the other one. The obtained results reinforce the idea that such a system and the proposed procedure can be an alternative in accomplishing this experiment in teaching laboratories.
