✓ Board-verified
Physics · 2026 · 1 mark
Dual Nature of Radiation and MatterEinstein’s Photoelectric Equation: Energy Quantum of Radiation1 markApplymcq
CBSE 2026 · Region 4 · Set 3 · Q12
Photons of frequency v are incident on the surfaces of two metals A and B of threshold frequencies v/2 and v/3. The ratio of maximum kinetic energy…
Photons of frequency $\displaystyle v$ are incident on the surfaces of two metals A and B of threshold frequencies $\displaystyle \frac{v}{2}$ and $\displaystyle \frac{v}{3}$. The ratio of maximum kinetic energy of electrons emitted from metal A to that from metal B is :
Official answer
(B)
$\displaystyle \frac{3}{4}$
All Dual Nature of Radiation and Matter questions2026 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 2026 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.