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Previous year question hub

Atoms And Nuclei - Modern Physics - Physics Previous Year Questions

Practice Atoms And Nuclei - Modern Physics - Physics previous year questions organised from real papers, with year-wise coverage and clear topic navigation.

14Papers
12Years
31Questions
1Topics

Atoms And Nuclei question pattern

Every graph below is calculated only from this selection.

Questions by year

Year-wise coverage for Atoms And Nuclei. Each bar uses a separate theme-derived color.

Difficulty distribution

How the classified questions are distributed by difficulty.

Not classified 33 100%

Question type distribution

MCQ, numerical, multiple-select and other formats found in these papers.

Multiple Choices 33 100%

Subject weightage

Top subjects by unique question coverage.

Physics
31 Qs

Most asked topics

Top topics across the included previous year papers.

Modern Physics
31 Qs

Subtopic coverage

Top subtopics inside this exact selection.

Atoms And Nuclei
31 Qs

Paper coverage

Question coverage for the most populated papers. Every active PYP paper remains listed below.

WB JEE 2026
2 Qs
WB JEE 2026
2 Qs
WB JEE 2025
4 Qs
VITEEE 2025
2 Qs
WB JEE 2024
1 Qs
WB JEE 2023
2 Qs
WB JEE 2022
3 Qs
WB JEE 2021
2 Qs
WB JEE 2020
3 Qs
WB JEE 2019
3 Qs
WB JEE 2018
3 Qs
WB JEE 2017
3 Qs
WB JEE 2016
1 Qs
WB JEE 2008
2 Qs

Included previous year papers

Newest papers appear first. Sort by year, question coverage or name.

PaperYear / sessionQuestions in this viewOpen
WB JEE 202620262View paper
WB JEE 202620262View paper
VITEEE 202520252View paper
WB JEE 202520254View paper
WB JEE 202420241View paper
WB JEE 202320232View paper
WB JEE 202220223View paper
WB JEE 202120212View paper
WB JEE 202020203View paper
WB JEE 201920193View paper
WB JEE 201820183View paper
WB JEE 201720173View paper
WB JEE 201620161View paper
WB JEE 200820082View paper

All Atoms And Nuclei previous year questions

Practice every matching question in batches of 20, with every available option.

1
2016 · Physics · Modern Physics · Atoms And Nuclei
WB JEE 2016
The wavelength of second Balmer line in hydrogen spectrum is 600 nm. The wavelength for its third line in Lyman series is
A
120 nm
B
600 nm
C
400 nm
D
200 nm
Open complete paper
2
2017 · Physics · Modern Physics · Atoms And Nuclei
WB JEE 2017
Radon-222 has a half-life of 3.8 days. If one starts with 0.064 kg of radon-222 left after 19 days will be
A
0.002 kg
B
0.062 kg
C
0.032 kg
D
0.024 kg
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3
2017 · Physics · Modern Physics · Atoms And Nuclei
WB JEE 2017
The de-Broglie wavelength of an electron is \(0.4 \times {10^{ - 10}}\) m when its kinetic energy is 1.0 keV. Its wavelength will be \(1.0 \times {10^{ - 10}}\) m, when its kinetic energy is
A
0.2 keV
B
0.8 keV
C
0.63 keV
D
0.16 keV
Open complete paper
4
2017 · Physics · Modern Physics · Atoms And Nuclei
WB JEE 2017
Let vn and En be the respective speed and energy of an electron in the nth orbit of radius rn, in a hydrogen atom, as predicted by Bohr's model. Then
A
plot of \({{{E_n}{r_n}} \over {{E_1}{r_1}}}\) as a function of n is a straight line of slope 0
B
plot of \({{{r_n}{v_n}} \over {{r_1}{v_1}}}\) as a function of n is a straight line of slope 1
C
plot of ln\(\left( {{{{r_n}} \over {{r_1}}}} \right)\) as a function of ln (n) is a straight line of slope 2
D
plot of ln \(\left( {{{{r_n}{E_1}} \over {{E_n}{r_1}}}} \right)\) as a function of ln (n) is a straight line of slope 4
Open complete paper
5
2018 · Physics · Modern Physics · Atoms And Nuclei
WB JEE 2018
An electron accelerated through a potential of 10000 V from rest has a de-Broglie wave length \(\lambda\). What should be the accelerating potential, so that the wavelength is doubled?
A
20000 V
B
40000 V
C
5000 V
D
2500 V
Open complete paper
6
2018 · Physics · Modern Physics · Atoms And Nuclei
WB JEE 2018
How the linear velocity v of an electron in the Bohr orbit is related to its quantum number n?
A
\(v \propto {1 \over n}\)
B
\(v \propto {1 \over {{n^2}}}\)
C
\(v \propto {1 \over {\sqrt n }}\)
D
\(v \propto n\)
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7
2018 · Physics · Modern Physics · Atoms And Nuclei
WB JEE 2018
If the half-life of a radioactive nucleus is 3 days, nearly what fraction of the initial number of nuclei will decay on the third day? (Given, \(\root 3 \of {0.25} \approx 0.63\))
A
0.63
B
0.5
C
0.37
D
0.13
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8
2019 · Physics · Modern Physics · Atoms And Nuclei
WB JEE 2019
A parent nucleus X undergoes \(\alpha\)-decay with a half-life of 75000 yrs. The daughter nucleus Y undergoes \(\beta\)-decay with a half-life of 9 months. In a particular sample, it is found that the rate of emission of \(\beta\)-particles is nearly constant (over several months) at \({10^7}/h\). What will be the number of \(\alpha\)-particles emitted in an hour?
A
102
B
107
C
1012
D
1014
Open complete paper
9
2019 · Physics · Modern Physics · Atoms And Nuclei
WB JEE 2019
To which of the following the angular velocity of the electron in the n-th Bohr orbit is proportional?
A
\({n^2}\)
B
\({1 \over {{n^2}}}\)
C
\({1 \over {{n^{3/2}}}}\)
D
\({1 \over {{n^3}}}\)
Open complete paper
10
2019 · Physics · Modern Physics · Atoms And Nuclei
WB JEE 2019
A proton and an electron initially at rest are accelerated by the same potential difference. Assuming that a proton is 2000 times heavier than an electron, what will be the relation between the de Broglie wavelength of the proton (\(\lambda\)p) and that of electron (\(\lambda\)e)?
A
\(\lambda = 2000{\lambda _e}\)
B
\({\lambda _p} = {{{\lambda _e}} \over {2000}}\)
C
\({\lambda _p} = 20\sqrt 5 {\lambda _e}\)
D
\({\lambda _p} = {{{\lambda _e}} \over {20\sqrt 5 }}\)
Open complete paper
11
2020 · Physics · Modern Physics · Atoms And Nuclei
WB JEE 2020
For nuclei with mass number close to 119 and 238, the binding energies per nucleon are approximately 7.6 MeV and 8.6 MeV, respectively. If a nucleus of mass number 238 breaks into two nuclei of nearly equal masses, what will be the approximate amount of energy released in the process of fission?
A
214 MeV
B
119 MeV
C
2047 MeV
D
1142 MeV
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12
2020 · Physics · Modern Physics · Atoms And Nuclei
WB JEE 2020
If R is the Rydberg constant in cm-1, then hydrogen atom does not emit any radiation of wavelength in the range of
A
\({1 \over R}\) to \({4 \over {3R}}\) cm
B
\({7 \over 5R}\) to \({19 \over {5R}}\) cm
C
\({4 \over R}\) to \({36 \over {5R}}\) cm
D
\({9 \over R}\) to \({144 \over {7R}}\) cm
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13
2020 · Physics · Modern Physics · Atoms And Nuclei
WB JEE 2020
A nucleus X emits a \(\beta\)-particle to produce a nucleus Y. If their atomic masses are Mx and My respectively, then the maximum energy of the \(\beta\)-particle emitted is (where, me is the mass of an electron and c is the velocity of light)
A
\(({M_x} - {M_y} - {m_e}){c^2}\)
B
\(({M_x} - {M_y} + {m_e}){c^2}\)
C
\(({M_x} - {M_y} ){c^2}\)
D
\(({M_x} - {M_y} - {2m_e}){c^2}\)
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14
2021 · Physics · Modern Physics · Atoms And Nuclei
WB JEE 2021
Let r, v, E be the radius of orbit, speed of electron and total energy of electron respectively in H-atom. Which of the following quantities according to Bohr theory, is proportional to the quantum number n ?
A
vr
B
rE
C
\({r \over E}\)
D
\({r \over v}\)
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15
2021 · Physics · Modern Physics · Atoms And Nuclei
WB JEE 2021
A 12.5 eV electron beam is used to bombard gaseous hydrogen at ground state. The energy level upto which the hydrogen atoms would be excited is
A
2
B
3
C
4
D
1
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16
2022 · Physics · Modern Physics · Atoms And Nuclei
WB JEE 2022

Suppose in a hypothetical world the angular momentum is quantized to be even integral multiples of \({h \over {2\pi }}\). The largest possible wavelength emitted by hydrogen atoms in visible range in a world according to Bohr's model will be,

(Consider hc = 1242 Mev-fm)

A
153 nm
B
409 nm
C
121 nm
D
487 nm
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17
2022 · Physics · Modern Physics · Atoms And Nuclei
WB JEE 2022

If the kinetic energies of an electron, an alpha particle and a proton having same de-Broglie wavelength are \({\varepsilon _1},{\varepsilon _2}\) and \({\varepsilon _3}\) respectively, then

A
\({\varepsilon _1} > {\varepsilon _3} > {\varepsilon _2}\)
B
\({\varepsilon _1} = {\varepsilon _3} = {\varepsilon _2}\)
C
\({\varepsilon _1} < {\varepsilon _3} < {\varepsilon _2}\)
D
\({\varepsilon _1} > {\varepsilon _2} > {\varepsilon _3}\)
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18
2022 · Physics · Modern Physics · Atoms And Nuclei
WB JEE 2022

A sample of hydrogen atom in its ground state is radiated with photons of 10.2 eV energies. The radiation from the sample is absorbed by excited ionized He+. Thenwhich of the following statement/s is/are true?

A
He+ electron moves from n = 2 to n = 4.
B
In the He+ emission spectra, there will be 6 lines.
C
Smallest wavelength of He+ spectrum is obtained when transition taken place from n = 4 to n = 3.
D
He+ electron moves from n = 2 to n = 3.
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19
2023 · Physics · Modern Physics · Atoms And Nuclei
WB JEE 2023

A uniform magnetic field B exists in a region. An electron of charge q and mass m moving with velocity v enters the region in a direction perpendicular to the magnetic field. Considering Bohr angular momentum quantization, which of the following statements is/are true?

A
The radius of nth orbit \(\mathrm{r_n~\infty ~\sqrt n}\).
B
The minimum velocity of the electron is \(\frac{\sqrt{\mathrm{qB} \hbar}}{\mathrm{m}}\).
C
Energy of the \(\mathrm{n}^{\text {th }}\) level \(E_{n} ~\infty~n\).
D
Transition frequency \(\omega\) between two successive levels is independent of n.
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20
2023 · Physics · Modern Physics · Atoms And Nuclei
WB JEE 2023

If the potential energy of a hydrogen atom in the first excited state is assumed to be zero, then the total energy of n = \(\infty\) state is,

A
3.4 eV
B
6.8 eV
C
0
D
\(\infty\)
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Showing 20 of 31 questions