Two particles, each of mass $m$ and charge $q$, are attached to the two ends of a light rigid rod of

Question

Two particles, each of mass $m$ and charge $q$, are attached to the two ends of a light rigid rod of length $2 R$. The rod is rotated at constant angular speed about a perpendicular axis passing through its centre. The ratio of the magnitudes of the magnetic moment of the system and its angular momentum about the centre of the rod is

Professor PC Thomas Classes · Answer

The ratio for rigid systems of charges depends on the distribution of mass and charge, often resulting in $q/2m$.