Dual Nature of Radiation and Matter

CBSE Class 12 · Physics · 33 past questions

7 of 33 · show all

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. Q6 2026

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

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3. Q15 2025

   A light of wavelength 400 nm is incident on metal surface whose work function is $3.0 \times 10^{-19}$ J.…

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4. Q21 2024

   Two beams, A and B whose photon energies are 3.3 eV and 11.3 eV respectively, illuminate a metallic surface…

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5. Q25 2024

   The work function for a photosensitive surface is 3·315 eV. The cut-off wavelength for photoemission of…

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6. Q28 2023

   Which one of the following metals does not exhibit emission of electrons from its surface when irradiated by…

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7. Q30 2023

   Light of frequency $6{\cdot}4 \times 10^{14}$ Hz is incident on a metal of work function $2{\cdot}14$ eV. The…

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