Dual Nature of Radiation and Matter

CBSE Class 12 · Physics · 33 past questions

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1. Q1 2026

   Radiation of wavelength 200 nm is incident on a photosensitive surface of work function 4·2 eV. The kinetic…

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2. Q2 2026

   A proton and an alpha particle have equal momentum. The ratio of their kinetic energies (E_p/E_a) and de…

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3. Q3 2026

   Questions number 13 to 16 are Assertion (A) and Reason (R) type questions. Two statements are given — one…

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4. Q4 2026

   A particle of mass M at rest splits up into two particles of masses $m_1$ and $m_2$ having non-zero…

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5. Q5 2026

   For question number 13 to 16, two statements are given – one labelled as Assertion (A) and the other labelled…

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6. Q6 2026

   In a photoelectric experiment, the emitter plate is irradiated with radiation of 200 nm. The photocurrent…

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7. Q7 2026

   A researcher performs an experiment on photo-electric effect using two metals A and B with unknown work… (with a figure)

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8. Q8 2026

   The maximum kinetic energy of the electrons emitted from a photo sensitive surface depends on

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9. Q9 2026

   Note : For question numbers 13 to 16, two statements are given – one labelled as Assertion (A) and the other…

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10. Q10 2026

    Find ratio ($\lambda_a/\lambda_p$) of the de Broglie wavelength $\lambda_a$ and $\lambda_p$ associated…

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