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Dual Nature of Radiation and Matter - ISC Class 12 Physics Questions with Answers

51 past-paper questions on Dual Nature of Radiation and Matter from ISC Class 12 Physics papers (2027-2018), newest first. Open one to see its answer.

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Two particles A and B of masses $m_A$ and $m_B$ have de Broglie wavelength $\lambda_A$ and $\lambda_B$. If… 2027 · 2 marks · Numerical
Study the images shown in Figure 9 below carefully and answer the questions that follow. (All three surfaces have same work… 2027 · 3 marks · Short answer
What is the difference between a moving metallic ball colliding with another ball in motion and a photon colliding with an… 2027 · 1 mark · Short answer
Match the entries in Column I with those in Column II: Column I Column II 1. Planck A. Hydrogen spectrum 2. Einstein B. Wave… 2027 · 1 mark · MCQ
(i) The graphs below show variation of stopping potential versus frequency of incident radiation for metals A and B. The graphs… 2026 · 3 marks · Short answer
In the photoelectric effect, the maximum kinetic energy of the emitted photoelectron is ‘a’ and the work function of the metal is… 2026 · 2 marks · Numerical
In a hydrogen atom, an electron jumps from the first excited state to the ground state, and a photon is emitted. This photon is… 2026 · 3 marks · Numerical
The work functions for metals $M_{1}$ and $M_{2}$ are 1.9eV and 5.0eV respectively. Perform necessary calculations to find out… 2026 · 2 marks · Numerical
The wavelength $\lambda_e$ of an electron and $\lambda_p$ of a photon of same energy E are related by: (Understanding) 2026 · 1 mark · MCQ
Calculate the momentum of a photon having an energy of $4\cdot8\times10^{-19}\text{ J}.$ 2026 · 1 mark · Numerical
Two charged particles having same charge but different masses, are passed through a potential difference V. When V is varied… 2026 · 1 mark · Short answer
In an experiment on photoelectric effect, frequency of incident monochromatic light is increased. What is its effect on… 2026 · 2 marks · Short answer
An electron, a proton, a deuteron and an alpha particle are all accelerated from rest through the same potential difference… 2026 · 1 mark · MCQ
The graph below shows the variation of photoelectric current (I) with the applied voltage (V). What does $-4\text{V}$ on the… 2026 · 3 marks · Short answer
What are matter waves? 2026 · 1 mark · Short answer
If the wavelength of electromagnetic (em) radiation is equal to the de Broglie wavelength ($\lambda$) of an electron moving with… 2026 · 1 mark · MCQ
An electron is revolving around the nucleus of a hydrogen atom. If the radius of the first orbit is… 2025 · 1 mark · Numerical
If kinetic energy of moving electrons is made four times, then their de Broglie wavelength becomes: 2025 · 1 mark · MCQ
The graph of stopping potential ($V_0$) versus frequency ($f$) of incident UV radiation incident on a metallic surface is shown… 2025 · 3 marks · Numerical
The de Broglie wavelength of an electron in the first Bohr’s orbit of hydrogen atom is equal to: 2025 · 1 mark · MCQ
The work function of caesium metal is 2.04 eV and a graph between the variation of photoelectric current with a collector plate… 2025 · 1 mark · MCQ
How are energy (‘E’) and momentum (‘p’) of a photon related to each other? 2025 · 1 mark · Short answer
With reference to photoelectric effect, define the terms: Threshold frequency. Work function. 2025 · 2 marks · Short answer
It was found that certain metals like Zinc, Cadmium, Magnesium, etc. are photosensitive only to ultraviolet light. However, some… 2025 · 1 mark · MCQ
The graphs below show the variation of the stopping potential $V_S$ with the frequency ($\nu$) of the incident radiations for two… 2025 · 3 marks · Derivation
Name any one phenomenon where moving particles behave like waves. 2025 · 1 mark · Short answer
Intensity of monochromatic UV light incident on photocathode of a photoelectric cell is increased. What is its effect on… 2025 · 2 marks · Short answer
Plot a labelled graph of stopping potential ($V_s$) versus frequency ($\nu$) of incident UV radiation. State how the value of… 2025 · 3 marks · Short answer
de Broglie wavelength of moving particles does not depend on their: 2025 · 1 mark · MCQ
What is meant by “Dual nature of matter”? 2025 · 1 mark · Short answer
How does stopping potential in photoelectric emission vary if the intensity of the incident radiation increases? the frequency of… 2025 · 2 marks · Short answer
In an experiment on photo electric effect, how does stopping potential change, if at all, when intensity of incident… 2024 · 3 marks · Short answer
What is ‘Pair production’? 2024 · 1 mark · Short answer
The de-Broglie wavelength ($\lambda$) associated with a moving electron having kinetic energy ($E$) is given by: 2024 · 1 mark · MCQ
With reference to photoelectric effect, plot a labelled graph of stopping potential ($V_s$) versus frequency ($f$) of the… 2023 · 3 marks · Drawing
Matter waves are: 2023 · 1 mark · MCQ
Monochromatic light of wavelength $396\text{ nm}$ is incident on the surface of a metal whose work function is… 2023 · 3 marks · Numerical
The graph of de-Broglie wavelength ($\lambda$) of a moving electron versus its velocity ($v$) is: 2023 · 1 mark · MCQ
Which of the following graphs correctly represents the variation of maximum kinetic energy ($E_k$) of photoelectrons with the… 2022 · 1 mark · MCQ
Calculate maximum kinetic energy of photoelectrons emitted by a metal (work function = $1\cdot5\text{ eV}$) when it is… 2022 · 2 marks · Numerical
Find the de Broglie wavelength of electrons moving with a speed of $7 \times 10^6\text{ ms}^{-1}$. 2022 · 1 mark · Numerical
State de Broglie hypothesis. What conclusion can be drawn from Davisson and Germer’s experiment? 2020 · 2 marks · Short answer
In photoelectric effect experiment, the slope of the graph of the stopping potential versus frequency gives the value of: 2020 · 1 mark · MCQ
What is Pair production? 2020 · 1 mark · Short answer
Define the following with reference to photoelectric effect: Threshold frequency ($f_0$) Stopping potential ($V_s$) 2019 · 2 marks · Short answer
The energy associated with light of which of the following colours is minimum: 2019 · 1 mark · MCQ
For each of the following, state one phenomenon in which: particles behave like waves. waves behave like particles. 2018 · 2 marks · Short answer
Einstein’s photoelectric equation is: 2018 · 1 mark · MCQ
State de Broglie hypothesis. With reference to photoelectric effect, define threshold wavelength. 2018 · 2 marks · Short answer
de Broglie wavelength of a moving particle is $\lambda$. Its momentum is given by: 2018 · 1 mark · MCQ
Plot a labelled graph of maximum kinetic energy of photo electrons versus frequency of incident radiation. State how you will… 2018 · 2 marks · Drawing

Dual Nature of Radiation and Matter - ISC Class 12 Physics Questions with Answers

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