NEET 2025 | Atoms and Nuclei Question 1 | Physics

A particle of mass $m$ is moving around the origin with a constant force $F$ pulling it towards the origin. If Bohr model is used to describe its motion, the radius of the $n^{\text {th }}$ orbit and the particle's speed $v$ in the orbit depend on $n$ as

$r \propto n^{2 / 3} ; v \propto n^{1 / 3}$

$r \propto n^{4 / 3} ; v \propto n^{-1 / 3}$

$r \propto n^{1 / 3} ; v \propto n^{1 / 3}$

$r \propto n^{1 / 3} ; v \propto n^{2 / 3}$

NEET 2024 (Re-Examination)

MCQ (Single Correct Answer)

-1

The spectral series which corresponds to the electronic transition from the levels $$n_2=5,6, \ldots$$ to the level $$n_1=4$$ is

Pfund series

Brackett series

Lyman series

Balmer series

NEET 2024 (Re-Examination)

MCQ (Single Correct Answer)

-1

Water is used as a coolant in a nuclear reactor because of its

high thermal expansion coefficient

high specific heat capacity

low density

low boiling point

NEET 2024 (Re-Examination)

MCQ (Single Correct Answer)

-1

Some energy levels of a molecule are shown in the figure with their wavelengths of transitions. Then :

NEET 2024 (Re-Examination) Physics - Atoms and Nuclei Question 2 English

$$\lambda_3>\lambda_2, \lambda_1=2 \lambda_2$$

$$\lambda_3>\lambda_2, \lambda_1=4 \lambda_2$$

$$\lambda_1>\lambda_2, \lambda_2=2 \lambda_3$$

$$\lambda_2>\lambda_1, \lambda_2=2 \lambda_3$$

NEET Subjects

Biology

Zoology

Human Health and Diseases Body Fluids and Its Circulation Locomotion and Movement Neural Control and Coordination Reproduction in Organisms Reproductive Health Structural Organisation in Animals Digestion and Absorption Excretory Products and Their Elimination Chemical Coordination and Integration Human Reproduction Animal Kingdom Breathing and Exchange of Gases Evolution