Photoelectric EffectHard

Question

In Bohr′s model of hydrogen atom, the centripetal force is provided by the Coulomb attraction between the proton and the electron. If a0 is the radius of the ground state orbit, m is the mass and e the charge of an electron and e0 is the vacuum permittivity, the speed of the electron is : 

Options

A.zero
B.
C.
D.

Solution


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