1
NEET 2025
MCQ (Single Correct Answer)
+4
-1
Change Language

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

A
$r \propto n^{2 / 3} ; v \propto n^{1 / 3}$
B
$r \propto n^{4 / 3} ; v \propto n^{-1 / 3}$
C
$r \propto n^{1 / 3} ; v \propto n^{1 / 3}$
D
$r \propto n^{1 / 3} ; v \propto n^{2 / 3}$
2
NEET 2024 (Re-Examination)
MCQ (Single Correct Answer)
+4
-1
Change Language

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

A
Pfund series
B
Brackett series
C
Lyman series
D
Balmer series
3
NEET 2024 (Re-Examination)
MCQ (Single Correct Answer)
+4
-1
Change Language

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

A
high thermal expansion coefficient
B
high specific heat capacity
C
low density
D
low boiling point
4
NEET 2024 (Re-Examination)
MCQ (Single Correct Answer)
+4
-1
Change Language

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

A
$$\lambda_3>\lambda_2, \lambda_1=2 \lambda_2$$
B
$$\lambda_3>\lambda_2, \lambda_1=4 \lambda_2$$
C
$$\lambda_1>\lambda_2, \lambda_2=2 \lambda_3$$
D
$$\lambda_2>\lambda_1, \lambda_2=2 \lambda_3$$
NEET Subjects
EXAM MAP