WBJEE SERIES Physics
De Broglie Hypothesis
5 previous year questions.
Volume: 5 Ques
Yield: Medium
High-Yield Trend
1
2026 1
2025 1
2023 1
2022 1
2017 Chapter Questions 5 MCQs
01
PYQ 2017
medium
physics ID: wbjee-20
The de Broglie wavelength of an electron is m when its kinetic energy is . Its wavelength will be , when its kinetic energy is
1
0.2 keV
2
0.8 keV
3
0.63 keV
4
0.16 keV
02
PYQ 2022
medium
physics ID: wbjee-20
If the kinetic energies of an electron, an alpha particle, and a proton having the same de-Broglie wavelength are respectively, then
1
ε1>ε3>ε2
2
ε1 = ε2 = ε3
3
ε1<ε3<ε2
4
ε1>ε2>ε3
03
PYQ 2023
easy
physics ID: wbjee-20
Two base balls(masses; m1=100g, and m2=50g) are thrown. Both move with uniform velocity, but the velocity of m2 is 1.5 times that of m1.The ration of de Broglie wavelengths λ(m1) : λ(m2) is given by
1
4:3
2
3:4
3
2:1
4
1:2
04
PYQ 2025
hard
physics ID: wbjee-20
The de-Broglie wavelength of a moving bus with speed is . Some passengers left the bus at a stop. Now, when the bus moves with twice of its initial speed, its kinetic energy is found to be twice of its initial value. What is the de-Broglie wavelength of the bus now?
1
2
3
4
05
PYQ 2026
medium
physics ID: wbjee-20
The de-Broglie wavelength of a moving bus with speed is . Some passengers left the bus at a stoppage. Now when the bus moves with twice of its initial speed, its kinetic energy is found to be twice its initial value. What is the de-Broglie wavelength of the bus now?
1
2
3
4
About De Broglie Hypothesis - WBJEE
De Broglie Hypothesis is a vital chapter for WBJEE aspirants. Mastering the concepts covered in this chapter is essential for securing a top rank.
By rigorously practicing the previous year questions associated with this chapter, you can identify high-yield topics, understand the examiner's perspective, and boost your confidence during the actual exam.
Frequently Asked Questions
Why focus on De Broglie Hypothesis PYQs?
Analyzing PYQs for this specific chapter reveals the most frequently tested concepts and the typical complexity of questions, allowing you to tailor your study plan efficiently.
How to best use this analysis?
Review the topic breakdown to see which sub-topics within De Broglie Hypothesis carry the most weight. Then, tackle the questions iteratively to solidify your understanding.