Biology NEET Previous Year Question Paper NEET 2019 Previous Year Question Paper Single Correct MCQ
Published on: August 14, 2026

PHYSICS

The radius of the first permitted Bohr orbit, for the electron, in a hydrogen atom equals 0.51 and its ground state energy equals -13.6 eV. If the electron in the hydrogen atom is replaced by muon [charge same as electron and mass 207 m e ], the first Bohr radius and ground state energy will be __________.

A
2.56 x 10 -13 m, -13.6 eV
B
0.53 x 10 -13 m, -3.6 eV
C
25.6 x 10 -13 , -2.8 eV
D
2.56 x 10 -13 m, -2.8 keV

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The correct answer is:
NOT AVAILABLE

Given that,

r e = 0.51 = 0.51 x l0 -10 m

As we know according to Bohr's model.

Mass of muon, = 207x m e

Now, At equilibrium

Similarly, energy of muon is given as

=-2.8keV

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