✓ Board-verified
Physics · 2024 · 1 mark
Dual Nature of Radiation and MatterExperimental Study of Photoelectric Effect1 markAnalyseassertion reason
CBSE 2024 · Region 4 · Set 1 · Q13
Assertion (A): Electrons are ejected from the surface of zinc when it is irradiated by yellow light. Reason (R): Energy associated with a photon of…
Assertion (A) : Electrons are ejected from the surface of zinc when it is irradiated by yellow light.
Reason (R) : Energy associated with a photon of yellow light is more than the work function of zinc.
Official answer
(D)
Assertion (A) is false, but Reason (R) is true.
All Dual Nature of Radiation and Matter questions2024 question paperNCERT solutions: Dual Nature of Radiation and MatterPractice Dual Nature of Radiation and Matter →
More from Dual Nature of Radiation and Matter
- The de-Broglie wavelength associated with an electron is 0.30 nm. Calculate: the speed, and the kinetic energy (in eV), of the electron.2022
- In a photoelectric experiment, the emitter plate is irradiated with radiation of 200 nm. The photocurrent becomes zero when the collector plate…2026
- Draw a plot of frequency v of incident radiations as a function of stopping potential V_0 for a given photo emissive material. What information can…2025
- A particle is associated with a de Broglie wave of wavelength 1.2 nm. The kinetic energy of the particle is made four times. Calculate the new value…2023
- de Broglie wavelength λ as a function of 1/(√ K), for two particles of masses m_1 and m_2 are shown in the figure. Here, K is the energy of the…2024
- The energy of a photon of wavelength 663 nm is2023
- Consider a neutron (mass m ) of kinetic energy E and a photon of the same energy. Let λ_n and λ_p be the de Broglie wavelength of neutron and the…2024
- Mention any three features of results of experiment on photoelectric effect which cannot be explained using the wave theory of light. In his…2025
CBSE Class 12 Physics past-paper question from the 2024 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.