Dual Nature of Radiation PYQs - Last 5 Years

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Practice 23 COMEDK Physics questions from Dual Nature of Radiation. Use the year-wise and type-wise breakdown to prioritize recent PYQs, then continue into the question list below.

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Last 5 Years Dual Nature of Radiation Questions

Showing 23 of 23 filtered questions.

1Dual Nature Of Radiation

What is the ratio of de Broglie wavelength of an electron to that of proton if the velocity of proton is $\frac{1}{6}$ the velocity of electron?

2Dual Nature Of Radiation

A monochromatic beam of photons of intensity to $1.5 \mathrm{Wm}^{-2}$ and energy 11.2 eV is incident on a material of work function 4.8 eV . What is the maximum speed of photoelectrons emitted due to photoelectric effect if, only $0.53 \%$...

3Dual Nature Of Radiation

The variation of the stopping potential ( $\mathrm{V}_{\mathrm{o}}$ ) with the frequency of incident radiation( $n$ ) is as given below.
[no - threshold frequency. h - Planck's constant e-electronic charge] then the slope of the graph AB wi...

4Dual Nature Of Radiation

When metal of work function 1.4 eV is exposed to a radiation, the maximum kinetic energy of the electron emitted is 0.4 eV . The stopping potential required is:

5Dual Nature Of Radiation

The basic principle used behind the working of electron microscope is:

6Dual Nature Of Radiation

A particle of mass $M$ at rest decays into masses $m_1$ and $m_2$ with non-zero velocities. The ratio of de Broglie wavelengths $\lambda_1$ and $\lambda_2$ of the particles is

7Dual Nature Of Radiation

Emission of electrons from a metal plate illuminated with monochromatic electromagnetic radiation will always take place provided

8Dual Nature Of Radiation

A plot of kinetic energy of emitted photoelectrons from a metal versus the frequency of incident radiation gives a straight line, the intercept of which
A. Depends on the nature of the metal used
B. Depends on the intensity of radiation
C. ...

9Dual Nature Of Radiation

The stopping potential when a metal surface is illuminated by light of wavelength $\lambda$ is 15 V . The stopping potential when the same surface is illuminated by light of wavelength $4 \lambda$ is 3 V . The ratio of threshold wavelength ...

10Dual Nature Of Radiation

de Broglie wave length associated with an electron accelerated through a potential difference ' V ' is ' $\lambda$ '. If the accelerating potential is halved, what will be the new wave length associated with the charged particle?

11Dual Nature Of Radiation

Which of the following statement is wrong regarding the photo electric effect.

12Dual Nature Of Radiation

The mass of a particle \(\mathrm{A}\) is double that of the particle \(\mathrm{B}\) and the kinetic energy of \(\mathrm{B}\) is \(\frac{1}{8}\)th that of A then the ratio of the de- Broglie wavelength of A to that of B is:

13Dual Nature Of Radiation

The difference in energy levels of an electron at two excited levels is \(13.75 \mathrm{~eV}\). If it makes a transition from the higher energy level to the lower energy level then what will be the wave length of the emitted radiation?
[giv...

14Dual Nature Of Radiation

The threshold frequency for a metal surface is '\(n_0\)'. A photo electric current '\(I\)' is produced when it is exposed to a light of frequency \(\left(\frac{11}{6}\right) \mathrm{n}_{\mathrm{o}}\) and intensity $$\mathrm{I}_{\mathrm{n}}$...

15Dual Nature Of Radiation

A particle of mass \(2 \mathrm{mg}\) has the same wavelength as a neutron moving with a velocity of \(3 \times 10^5 \mathrm{~ms}^{-1}\). The velocity of the particle is (mass of neutron is \(1.67 \times 10^{-27} \mathrm{Kg}\))

16Dual Nature Of Radiation

A photon emitted during the de-excitation of electron from a state \(\mathrm{n}\) to the second excited state in a hydrogen atom, irradiates a metallic electrode of work function \(0.5 \mathrm{~eV}\), in a photocell, with a stopping voltage...

17Dual Nature Of Radiation

The velocity of an electron so that its momentum is equal to that of a photon of wavelength \(660 \mathrm{~nm}\) is

18Dual Nature Of Radiation

\(\mathrm{K}_1\) and \(\mathrm{K}_2\) are maximum kinetic energies of photoelectrons emitted when lights of wavelength \(\lambda_1\) and \(\lambda_2\) respectively are incident on a metallic surface. If \(\lambda_1=3 \lambda_2\), then

19Dual Nature Of Radiation

In the photoelectric experiment, the frequency of the incident radiation is doubled. What will be its effect on the photoelectric current?

20Dual Nature Of Radiation

Let \(K_1\) be the maximum kinetic energy of photoelectrons emitted by light of wavelength \(\lambda_1\) and \(K_2\) corresponding to wavelength \(\lambda_2\). If \(\lambda_1=2 \lambda_2\), then

21Dual Nature Of Radiation

When a certain metal surface is illuminated with light of frequency \(\nu\), the stopping potential for photoelectric current is \(V_0\). When the same surface is illuminated by light of frequency \(\frac{\nu}{2}\), the stopping potential i...

22Dual Nature Of Radiation

If K\(_1\) and K\(_2\) are maximum kinetic energies of photoelectrons emitted when lights of wavelengths \(\lambda_1\) and \(\lambda_2\), respectively incident on a metallic surface and \(\lambda_1=3\lambda_2\), then

23Dual Nature Of Radiation

Ultraviolet light of wavelength 99 mm falls on a metal plate of work function 1.0 eV. If the mass of the electron is 9.1 \(\times\) 10\(^{-31}\) kg, the wavelength of the fastest photoelectron emitted is