In a hydrogen atoms an electron moves in an orbit of radius 5.0*10-^11with a speed of 2.2*10^6m/s. find the equivalent current.(electric charge =1.6*10^-19c)
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It would be nice to have a classical “picture” of an electron, there is even a classical model for conduction in a resistive element, so why not?
First came Bohr with an estimation of the atom size 10−10 meters, then the classical radius inferred using Einstein famous equation of mass energy equated by charge energy on the sphere surface, to give a radius ∼10−15 , but with serious problems like Coulomb force equilibrium and electric charge not compensating real mass energy. Suddenly someone discover magnetic moment of the electron and all the classical concept collapses cause, to take account of this property, the charge on the equator of the rotating sphere needs peripheral velocity in excess of the speed of light!, so you need a big sphere (orders of magnitude) or, to extend the agony of the “classical” idealization invent the spinning ring model (1915), better but not without faults.