  In this work, we demonstrate explicitly the unified nature of electric and
magnetic fields, from the principles of special relativity and Lorentz
transformations of the electromagnetic field tensor. Using an operational
approach we construct the tensor and its corresponding transformation law,
based on the principle of relativity. Our work helps to elucidate concepts of
advanced courses on electromagnetism for primary-level learners and shows an
alternative path to derive the Lenz's law based solely on relativity arguments.
