BITSAT 2025 | Atoms and Nuclei Question 2 | Physics

The mass of proton is 1.0073 u and that of neutron is $1.0087 \mathrm{u}(\mathrm{u}=$ atomic mass unit). The binding energy of ${ }_2 \mathrm{He}^4$ is

28.4 MeV

0.061 u

0.0305 J

0.0305 erg

BITSAT 2024

MCQ (Single Correct Answer)

-1

Which of the following transitions of $ \mathrm{He}^{+} $ion will give rise to spectral line which has same wavelength as the spectral line in hydrogen atom?

$ n=4 $ to $ n=2 $

$ n=6 $ to $ n=5 $

$ n=6 $ to $ n=3 $

None of these

BITSAT 2023

MCQ (Single Correct Answer)

-1

The total energy of an electron in the second excited state of hydrogen atom is about $$-1.51 \mathrm{~eV}$$. Its kinetic energy in this state is

$$-1.5 \mathrm{~eV}$$

$$-3.02 \mathrm{~eV}$$

3.02 eV

1.51 eV

BITSAT 2023

MCQ (Single Correct Answer)

-1

After two hours one-eight of the starting amount of a certain radioactive isotope remained undecayed. The half-life of the isotope is

15 min

40 min

45 min

4 h

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