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