CUET PG PYQs for Modern Physics with Solutions: Practice CUET PG Previous Year Questions

Content Writer | Journalism Graduate | Updated 3+ months ago

Modern Physics is an important topic in the Geophysics section in CUET PG exam. Practising this topic will increase your score overall and make your conceptual grip on CUET PG exam stronger.

This article gives you a full set of CUET PG PYQs for Modern Physics with explanations for effective preparation. Practice of CUET PG Geophysics PYQs including Modern Physics questions regularly will improve accuracy, speed, and confidence in the CUET PG 2026 exam.

CUET PG PYQs for Modern Physics with Solutions

1.
According to Wien's displacement law, how is the surface temperature of a star related to its maximum intensity wavelength?
- $\lambda_{\text{max}} \propto T$
- $\lambda_{\text{max}} \propto \frac{1}{T}$
- $\lambda_{\text{max}} \propto T^2$
- $\lambda_{\text{max}} \propto \frac{1}{T^2}$
View Solution
2.
X- rays of wavelength 15 pm are scattered from a target. The wavelength of the X-rays scattered through 60° is (Given compton wavelength = 2.426 pm)
- 13.787 pm (pm is pico metre)
- 16.213 pm (pm is pico metre)
- 15.5 pm (pm is pico metre)
- 1.6213 pm (pm is pico metre)
View Solution
3.
What is the shape of the air film formed in the Newton's ring experiment?
- Plane
- Cylindrical
- Spherical
- Wedge-shaped
View Solution
4.
In Photo- electric effect
(A) There is no time interval (very small ~ 10⁻⁹s) between incidence of light and emissions of photo electrons.
(B) Higher the frequency of light, more is the kinetic energy of photo electrons emitted.
(C) A bright light yields more photo-electrons than dim light.
(D) Blue light emits slower electrons than red light.
Choose the correct answer from the options given below:
- (A), (B) and (C) only
- (A), (B) and (D) only
- (B), (C) and (D) only
- (A), (C) and (D) only
View Solution
5.
According to the Special Theory of Relativity, what happens to the length of an object as its velocity approaches the speed of light?
- It increases
- It decreases (length contraction)
- It remains unchanged
- It becomes infinite
View Solution
6.
The Rayleigh Jean's Law,
(A) agrees well with experimental results at low frequencies.
(B) agrees well with experimental results at longer. wavelengths.
(C) shows ultra-violet catastrophe at higher frequencies.
(D) agrees well with experimental results at higher frequencies.
Choose the correct answer from the options given below:
- (A), (B) and (D) only
- (A), (B) and (C) only
- (B), (C) and (D) only
- (A), (C) and (D) only
View Solution
7.
What is the Compton shift for a photon backscattered at 180 degrees?
- $\frac{h}{mc}$
- $\frac{2h}{mc}$
- $\frac{h}{2mc}$
- $0$
View Solution
8.
What is the de Broglie wavelength of an electron accelerated through a potential difference of $V$ volts?
- $\dfrac{h}{mv}$
- $\dfrac{h}{\sqrt{2meV}}$
- $\dfrac{h}{eV}$
- $\sqrt{\dfrac{2eV}{m}}$
View Solution
9.
What is the energy of the ground state of a hydrogen atom according to the Bohr model?
- $-13.6\ \text{eV}$
- $-3.4\ \text{eV}$
- $-1.51\ \text{eV}$
- $0\ \text{eV}$
View Solution
10.
Which statistical distribution describes the behavior of identical, indistinguishable particles with half-integral spin?
- Maxwell–Boltzmann distribution
- Bose–Einstein distribution
- Fermi–Dirac distribution
- Gaussian distribution
View Solution

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CUET PG PYQs for Modern Physics with Solutions: Practice CUET PG Previous Year Questions

CUET PG PYQs for Modern Physics with Solutions

1.
According to Wien's displacement law, how is the surface temperature of a star related to its maximum intensity wavelength?

2.
X- rays of wavelength 15 pm are scattered from a target. The wavelength of the X-rays scattered through 60° is (Given compton wavelength = 2.426 pm)

3.
What is the shape of the air film formed in the Newton's ring experiment?

5.
According to the Special Theory of Relativity, what happens to the length of an object as its velocity approaches the speed of light?

7.
What is the Compton shift for a photon backscattered at 180 degrees?

8.
What is the de Broglie wavelength of an electron accelerated through a potential difference of \(V\) volts?

9.
What is the energy of the ground state of a hydrogen atom according to the Bohr model?

10.
Which statistical distribution describes the behavior of identical, indistinguishable particles with half-integral spin?

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CUET PG PYQs for Modern Physics with Solutions

1.According to Wien's displacement law, how is the surface temperature of a star related to its maximum intensity wavelength?

2.X- rays of wavelength 15 pm are scattered from a target. The wavelength of the X-rays scattered through 60° is (Given compton wavelength = 2.426 pm)

3.What is the shape of the air film formed in the Newton's ring experiment?

5.According to the Special Theory of Relativity, what happens to the length of an object as its velocity approaches the speed of light?

7.What is the Compton shift for a photon backscattered at 180 degrees?

8.What is the de Broglie wavelength of an electron accelerated through a potential difference of \(V\) volts?

9.What is the energy of the ground state of a hydrogen atom according to the Bohr model?

10.Which statistical distribution describes the behavior of identical, indistinguishable particles with half-integral spin?

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1.
According to Wien's displacement law, how is the surface temperature of a star related to its maximum intensity wavelength?

2.
X- rays of wavelength 15 pm are scattered from a target. The wavelength of the X-rays scattered through 60° is (Given compton wavelength = 2.426 pm)

3.
What is the shape of the air film formed in the Newton's ring experiment?

5.
According to the Special Theory of Relativity, what happens to the length of an object as its velocity approaches the speed of light?

7.
What is the Compton shift for a photon backscattered at 180 degrees?

8.
What is the de Broglie wavelength of an electron accelerated through a potential difference of \(V\) volts?

9.
What is the energy of the ground state of a hydrogen atom according to the Bohr model?

10.
Which statistical distribution describes the behavior of identical, indistinguishable particles with half-integral spin?