NEET Physics Dual Nature of Matter and Radiation De-Broglie Hypothesis MCQs

Prepare for NEET Physics Dual Nature of Matter and Radiation (De-Broglie Hypothesis) with MCQs & PYQs on NEET.GUIDE. Access free practice, previous year questions, and expert solutions to understand matter waves and their wavelengths.

NEET Questions / Physics / Dual Nature of Matter and Radiation / De-Broglie Hypothesis

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Photoelectric Effect (Lenard'S Experiment)

Einsteins Photo Electric Equation

De-Broglie Hypothesis

An electron and a proton are accelerated through the same potential difference. What is the ratio of their de Broglie wavelengths?

A

1

B

1/43

C

43

D

1849

Question Tags

📚 Subject:Physics

📑 Chapter:Dual Nature of Matter and Radiation

🎯Topic:De-Broglie Hypothesis

🎓 Ncert Level:Application

🎯Difficulty :Hard

⚡ Time Required :2 mins

🔄Ncert Concepts :De-Broglie Hypothesis, Kinetic Energy, Momentum

A particle of mass $m$ is confined to a one-dimensional box of length $L$ . If its de Broglie wavelength is $2L/3$ , what is its kinetic energy?

A

$h^2/8mL^2$

B

$h^2/2mL^2$

C

$4h^2/8mL^2$

D

$9h^2/8mL^2$

Question Tags

📚 Subject:Physics

📑 Chapter:Dual Nature of Matter and Radiation

🎯Topic:De-Broglie Hypothesis

🎓 Ncert Level:Application

🎯Difficulty :Hard

⚡ Time Required :2 mins

🔄Ncert Concepts :De-Broglie Hypothesis, Particle in a Box, Kinetic Energy

A relativistic electron has a de Broglie wavelength of $10^{-14}$ m. Which of the following is closest to its kinetic energy?

A

1 keV

B

120 keV

C

1.2 MeV

D

120 MeV

Question Tags

📚 Subject:Physics

📑 Chapter:Dual Nature of Matter and Radiation

🎯Topic:De-Broglie Hypothesis

🎓 Ncert Level:Application

🎯Difficulty :Hard

⚡ Time Required :3 mins

🔄Ncert Concepts :De-Broglie Hypothesis, Relativity, Kinetic Energy

An alpha particle and a proton are accelerated through the same potential difference V. If the alpha particle's de Broglie wavelength is $\lambda_\alpha$ , what is the proton's de Broglie wavelength?

A

$\lambda_\alpha/2$

B

$\lambda_\alpha/\sqrt{2}$

C

$\sqrt{2}\lambda_\alpha$

D

$2\sqrt{2}\lambda_\alpha$

Question Tags

📚 Subject:Physics

📑 Chapter:Dual Nature of Matter and Radiation

🎯Topic:De-Broglie Hypothesis

🎓 Ncert Level:Application

🎯Difficulty :Hard

⚡ Time Required :3 mins

🔄Ncert Concepts :De-Broglie Hypothesis, Kinetic Energy

If a proton and an alpha particle have the same de Broglie wavelength, what is the ratio of their speeds?

A

1:1

B

2:1

C

1:4

D

4:1

Question Tags

📚 Subject:Physics

📑 Chapter:Dual Nature of Matter and Radiation

🎯Topic:De-Broglie Hypothesis

🎓 Ncert Level:Application

🎯Difficulty :Hard

⚡ Time Required :2 mins

🔄Ncert Concepts :De-Broglie Hypothesis, Momentum

An electron is accelerated through a potential difference $V$ . If its de Broglie wavelength is initially $\lambda$ , and the potential difference is increased to $4V$ , what will its new de Broglie wavelength be?

A

$2\lambda$

B

$\lambda$

C

$\lambda/2$

D

$\lambda/4$

Question Tags

📚 Subject:Physics

📑 Chapter:Dual Nature of Matter and Radiation

🎯Topic:De-Broglie Hypothesis

🎓 Ncert Level:Application

🎯Difficulty :Hard

⚡ Time Required :2 mins

🔄Ncert Concepts :De-Broglie Hypothesis, Kinetic Energy

An electron and a proton have the same de Broglie wavelength. Which particle has greater kinetic energy?

A

The electron

B

The proton

C

They have the same kinetic energy

D

It depends on the velocity of the particles

Question Tags

📚 Subject:Physics

📑 Chapter:Dual Nature of Matter and Radiation

🎯Topic:De-Broglie Hypothesis

🎓 Ncert Level:Application

🎯Difficulty :Medium

⚡ Time Required :1 mins

🔄Ncert Concepts :De-Broglie Hypothesis, Kinetic Energy, Momentum

If the kinetic energy of a particle is doubled, its de Broglie wavelength changes by a factor of:

A

2

B

$\sqrt{2}$

C

$1/\sqrt{2}$

D

1/2

Question Tags

📚 Subject:Physics

📑 Chapter:Dual Nature of Matter and Radiation

🎯Topic:De-Broglie Hypothesis

🎓 Ncert Level:Application

🎯Difficulty :Medium

⚡ Time Required :1 mins

🔄Ncert Concepts :De-Broglie Hypothesis, Kinetic Energy

What is the de Broglie wavelength of an electron accelerated through a potential difference of 100 V?

A

12.3 Å

B

1.23 Å

C

0.123 Å

D

123 Å

Question Tags

📚 Subject:Physics

📑 Chapter:Dual Nature of Matter and Radiation

🎯Topic:De-Broglie Hypothesis

🎓 Ncert Level:Application

🎯Difficulty :Medium

⚡ Time Required :1 mins

🔄Ncert Concepts :De-Broglie Hypothesis, Accelerating Potential

Which of the following statements is NOT a consequence of de Broglie's hypothesis?

A

Diffraction of electrons

B

Quantization of angular momentum in the Bohr model

C

Discrete energy levels in atoms

D

Existence of photons

Question Tags

📚 Subject:Physics

📑 Chapter:Dual Nature of Matter and Radiation

🎯Topic:De-Broglie Hypothesis

🎓 Ncert Level:Understanding

🎯Difficulty :Medium

⚡ Time Required :1 mins

🔄Ncert Concepts :De-Broglie Hypothesis

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