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  1. Tardigrade
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  4. Suppose the potential energy between electron and proton at a distance r is given by -(K e2/2 r3). Using Bohr's theory choose the correct statements :

Q. Suppose the potential energy between electron and proton at a distance is given by . Using Bohr's theory choose the correct statements :

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Solution:

We use the given potential energy for calculation of force electron as


Using Bohr's II Postulate we get


and
hence option (B) and (D) are correct as energy is inverssely proportional to .

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4. Muon is a negatively charged particle with a mass me, where me is the mass of the electron and e is the electronic charge. If - is bound to a proton to form a hydrogen like atom, identify the correct statements.
(A) Radius of the muonic orbit is times smaller than that of the electron.
(B) The speed of the in the orbit is times that of the electron in the orbit.
(C) The ionization energy of muonic atom is times more than that of an hydrogen atom.
(D) The momentum of the muon in the orbit is times more than that of the electron.

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5. The ratio of the wavelengths for transition in and is

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