# NEET Physics Nuclei Questions Solved

In a hypothetical Bohr hydrogen, the mass of the electron is doubled. The energy ${\mathrm{E}}_{0}$ and the radius ${\mathrm{r}}_{0}$ of the first orbit will be (${\mathrm{a}}_{0}$ is the Bohr radius)
(a)
(b)
(c)
(d)

(a) Here radius of electron orbit r ∝ 1/m and energy E ∝ m, where m is the mass of the electron.
Hence energy of hypothetical atom
and radius ${\mathrm{r}}_{0}=\frac{{\mathrm{a}}_{0}}{2}$

Difficulty Level:

• 40%
• 15%
• 35%
• 10%
Crack NEET with Online Course - Free Trial (Offer Valid Till August 23, 2019)