On the ‘‘explanation’’ of the null results of Trouton–Noble experiment

It is shown that a previous explanation of the null results of the Trouton‐Noble experiment, as suggested in the literature in terms of a modified definition of energy‐momentum density of electromagnetic fields, is beset with many difficulties. Contrary to what was claimed earlier, a ‘satisfactory’ explanation of the null results of the Trouton‐Noble experiment in no way demands a change in the standard definition of the electromagnetic energy‐momentum density. The pertinent ‘paradox’ of an electromagnetic torque on a freely suspended, charged parallel plate capacitor, as seen from a relatively moving frame of reference, is resolved using the conventional formulation of the energy and momentum densities of electromagnetic fields.