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Class 12 Physics Chapter 11 - Dual Nature of Radiation and Matter MCQ and Assertion Questions

Short Quiz · Class 12 · Physics · CBSE

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Chapter 11 - Dual Nature of Radiation and Matter | 5 questions | about 4 minutes

Practise Chapter 11 - Dual Nature of Radiation and Matter with Teachoo's Short Quiz (Class 12 · Physics · CBSE). Practise these questions in a free interactive quiz with answer feedback.

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Question 1 of 5
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Question 1 of 5
CBSE Past Year 2026

The velocity of the photoelectrons emitted from a surface depends upon the :

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Question 2 of 5
CBSE Past Year 2026

A proton and an alpha particle have equal momentum. The ratio of their kinetic energies \((E_p/E_a)\) and de Broglie wavelengths associated with them \((\lambda_p/\lambda_a)\) respectively are:

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Question 3 of 5
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Radiation of wavelength 200 nm is incident on a photosensitive surface of work function 4·2 eV. The kinetic energy of fastest photoelectrons emitted from this surface will be close to :

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Question 4 of 5
CBSE Past Year 2026

Assertion (A) : If accelerated electrons are passed through a narrow slit, a diffraction pattern is observed.

Reason (R) : Electrons behave as both particles and waves.

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Question 5 of 5
CBSE Past Year 2026

Assertion (A) : Photoelectric effect is a spontaneous phenomenon.

Reason (R) : According to the wave picture of radiation, an electron would take hours/days to absorb sufficient energy to overcome the work function and come out from a metal surface.

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