Question

the ratio of spcific charge of an electron to that of a proton is

Answer 1

This (almost) sides with Reinhardt-Karsten Muerb's answer. My full reasoning is as follows: “specific” routinely (in physics) means “per unit volume”†—which is pointless for the electron, since it appears (to the finest tolerance measured) to be a point-particle. I then read “specific” to mean “characteristic,” or “intrinsic,” i.e., measured away from other influences that might screen the observed charge. In turn, this is precisely what is reported in all tables, the magnitudes of the charges being equal to each other. Finally, as the signs of the two particles’ charges are opposite, the ratio is as reported above.