CUET · PHYSICS · PYQ PAPER 2025
A proton, an electron, a neutron and an alpha particle have the same energy. Their de Broglie's wavelengths are given below:
(A) \( \lambda_{proton} \)
(B) \( \lambda_{electron} \)
(C) \( \lambda_{neutron} \)
(D) \( \lambda_{alpha} \)
Arrange these wavelengths in decreasing order. Choose the correct answer from the options given below:
- A (A), (B), (C), (D)
- B (B), (A), (C), (D)
- C (D), (C), (A), (B)
- D (C), (B), (D), (A)
Answer & Solution
Correct Answer
(B) (B), (A), (C), (D)
Step-by-step Solution
Detailed explanation
\( \lambda = \frac{h}{\sqrt{2mE}} \) \( \lambda \propto \frac{1}{\sqrt{m}} \) (since \( h, E \) are constant) \( m_{electron} \( \lambda_{electron} > \lambda_{proton} > \lambda_{neutron} > \lambda_{alpha} \) (B), (A), (C), (D)
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from PHYSICS
- The total energy of the electron in a hydrogen atom is \( -1.51 \text{ eV} \).
A. Its Kinetic energy is \( -1.51 \text{ eV} \)
B. Its potential energy is \( -3.02 \text{ eV} \)
C. electron is in second excited state
D. The ground state energy of hydrogen atom is 13.6 eV
Choose the correct answer from the options given below:CUET 2023 Medium - A bar magnet when suspended horizontally and perpendicular to earth's field experiences a torque of \( 3 \times 10^{-4} \text{ N m} \). The Magnetic moment of the magnet would be: (take horizontal component of Earth's magnetic field at the place \( 0.4 \times 10^{-4} \text{ T} \))CUET 2023 Hard
- A small telescope has an objective lens of focal length 100 cm and an eye-piece of focal length 5 cm. The magnifying power of the telescope when the final image is formed at the least distance of distinct vision will beCUET 2025 Easy
- Choose the correct statements :
(A) A nuclide is represented as \( ^A_Z X \)
(B) Nuclids with same number of protons are called isotopes
(C) \( \alpha \)-ray scattering experiments allow determination of the nuclear radius
(D) Nuclids with same number of neutrons are called isotones
(E) The nuclear force distinguishes between neutron and proton
Choose the correct answer from the options given below :CUET 2023 Easy - The repetitive use of which of the following logic gate/s separately can be used to prepare an AND gate ?
(A) OR gate
(B) NOT gate
(C) NOR gate
(D) NAND gate
Choose the correct answer from the options given below :CUET 2023 Easy - A vertical electric field of magnitude \( 4.9 \times 10^5 \text{ NC}^{-1} \) just prevents a water droplet of mass \( 0.1 \text{ g} \) from falling. What is the charge on the droplet? Take acceleration due to gravity \( 9.8 \text{ ms}^{-2} \).CUET 2023 Medium
More PYQs from CUET
- The boiling point elevation constant \(K_b\) is also known as:CUET 2025 Medium
- Einstein photo-electric equation states that \(E_k = h\nu - \phi\). In the equation, \(E_k\) refers toCUET 2023 Hard
- In Miller's experiment, the closed flask contained :CUET 2023 Hard
- If \(A\) and \(B\) are square matrices of order 3 such that \(|A|=-1\) and \(|B|=5\), then the value of \(|3 A B|\) isCUET 2025 Hard
- Given \(X=\left[\begin{array}{cc}1 & 0 \\ -1 & 7\end{array}\right]\), then value of K if \(X^2=8 X+K I\) is :CUET 2023 Hard
- According to Gause's Competitive Exclusion Principle:CUET 2025 Medium