Dual Nature of Radiation PYQs - Last 10 Years

MHT CET / Physics / Modern Physics / 148 recent questions

PhysicsModern Physics2017-2026

All Dual Nature of Radiation PYQs Last 5 Years Create chapter test

Practice 148 MHT CET 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.

148

PYQs on Page

Physics / Modern Physics

2019-2026

Year Range

Based on indexed question metadata

114

Last 5 Years

2022-2026

148

Last 10 Years

2017-2026

Recent Year Trend

2021

2022

2023

2024

2025

2026

202132 max PYQs/year2026

Question Types

148PYQs

MCQ100%

Difficulty Mix

#1 Unknown148

114 in last 5 years148 in last 10 years

Last 10 Years Dual Nature of Radiation Questions

Showing 48 of 148 filtered questions.

1Dual Nature Of Radiation

When radiations of wavelength \(\lambda\) is incident on a metallic surface the stopping potential required is \(4.8 \mathrm{~V}\). If same surface is illuminated with radiations of double the wavelength, then required stopping potential be...

2Dual Nature Of Radiation

Dual nature of light is exhibited by

3Dual Nature Of Radiation

When light of wavelength \(\lambda\) is incident on a photosensitive surface the stopping potential is '\(\mathrm{V}\)'. When light of wavelength \(3 \lambda\) is incident on same surface the stopping potential is \(\frac{\mathrm{V}}{6}\). ...

4Dual Nature Of Radiation

Radiations of two photons having energies twice and five times the work function of metal are incident successively on metal surface. The ratio of the maximum velocity of photo electrons emitted in the two cases will be

5Dual Nature Of Radiation

When an electron is accelerated through a potential '\(V\)', the de-Broglie wavelength associated with it is '\(4 \lambda\)'. When the accelerating potential is increased to \(4 \mathrm{~V}\), its wavelength will be

6Dual Nature Of Radiation

Graph shows the variation of de-Broglie wavelength \((\lambda)\) versus \(\frac{1}{\sqrt{V}}\) where '\(V\)' is the accelerating potential for four particles A, B, C, D carrying same charge but of masses \(\mathrm{m_1, m_2, m_3, m_4}\). Whi...

7Dual Nature Of Radiation

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

8Dual Nature Of Radiation

A metal surface of work function \(1 \cdot 13 \mathrm{~eV}\) is irradiated with light of wavelength \(310 \mathrm{~nm}\). The retarding potential required to stop the escape of photoelectrons is [Take $$\frac{\mathrm{hc}}{\mathrm{e}}=1240 \...

9Dual Nature Of Radiation

When a metallic surface is illuminated with radiation of wavelength '\(\lambda\)', the stopping potential is '\(\mathrm{V}\)'. If the same surface is illuminated with radiation of wavelength '\(2 \lambda\)', the stopping potential is '$$\le...

10Dual Nature Of Radiation

Maximum kinetic energy of photon is '\(E\)' when wavelength of incident radiation is '\(\lambda\)'. If wavelength of incident radiations is reduced to \(\frac{\lambda}{3}\) then energy of photon becomes four times. Then work function of the...

11Dual Nature Of Radiation

An electron accelerated through a potential difference '\(V_1\)' has a de-Broglie wavelength '\(\lambda\)'. When the potential is changed to '\(V_2\)' its de-Broglie wavelength increases by \(50 \%\). The value of $$\left(\frac{\mathrm{V}_1...

12Dual Nature Of Radiation

The maximum kinetic energy of the photoelectrons varies

13Dual Nature Of Radiation

If the potential difference used to accelerate electrons is doubled, by what factor does the de-Broglie wavelength associated with electrons change?

14Dual Nature Of Radiation

If the kinetic energy of a free electron doubles, it's de Broglie wavelength (\(\lambda\)) changes by a factor

15Dual Nature Of Radiation

A photon has wavelength \(3 \mathrm{~nm}\), then its momentum and energy respectively will be \([\mathrm{h}=6.63 \times 10^{-34} \mathrm{Js}, \mathrm{c}=\) velocity of light \(=3 \times 10^8 \mathrm{~m} / \mathrm{s}]\)

16Dual Nature Of Radiation

In photoelectric experiment keeping the frequency of incident radiation and accelerating potential fixed, if the intensity of incident light is increased,

17Dual Nature Of Radiation

In a photoelectric experiment, a graph of maximum kinetic energy \((\mathrm{KE}_{\text {max }})\) against the frequency of incident radiation (v) is plotted. If \(\mathrm{A}\) and \(\mathrm{B}\) are the intercepts on the \(\mathrm{X}\) and ...

18Dual Nature Of Radiation

A light of wavelength '\(\lambda\)' and intensity '\(\mathrm{I}\)' falls on photosensitive material. If '\(\mathrm{N}\)' photo electrons are emitted, each with kinetic energy 'E', then

19Dual Nature Of Radiation

An electron of mass '\(m\)' and a photon have same energy '\(E\)'. The ratio of de-Broglie wavelength of electron to the wavelength of photon is \((\mathrm{c}=\) velocity of light)

20Dual Nature Of Radiation

When wavelength of incident radiation on the metal surface is reduced from '\(\lambda_1\)' to '\(\lambda_2\)', the kinetic energy of emitted photoelectrons is tripled. The work function of metal [\(\mathrm{h}=\) Plank's constant, $$\mathrm{...

21Dual Nature Of Radiation

According to de-Broglie hypothesis if an electron of mass '\(m\)' is accelerated by potential difference '\(V\)', the associated wavelength is '\(\lambda\)'. When a proton of mass '\(\mathrm{M}\)' is accelerated through potential difference...

22Dual Nature Of Radiation

de-Broglie wavelength associated with an electron accelerated through a potential difference '\(\mathrm{V}\)' is '\(\lambda\)'. When the accelerating potential is increased to '\(4 \mathrm{~V}\)', de-Broglie wavelength.

23Dual Nature Of Radiation

In photoelectric effect, the photo current

24Dual Nature Of Radiation

Kinetic energy of a proton is equal to energy '\(E\)' of a photon. Let '\(\lambda_1\)' be the de-Broglie wavelength of proton and '\(\lambda_2\)' is the wavelength of photon. If \(\frac{\lambda_1}{\lambda_2} \alpha E^n\), then the value of ...

25Dual Nature Of Radiation

When a light of wavelength '\(\lambda\)' falls on the emitter of a photocells, maximum speed of emitted photoelectrons is '\(\mathrm{V}\)'. If the incident wavelength is changed to \(\frac{2 \lambda}{3}\), maximum speed of emitted photoelec...

26Dual Nature Of Radiation

Photons of energy \(10 \mathrm{~eV}\) are incident on a photosensitive surface of threshold frequency \(2 \times 10^{15} \mathrm{~Hz}\). The kinetic energy in \(\mathrm{eV}\) of the photoelectrons emitted is
[Planck's constant $$\mathrm{h}=...

27Dual Nature Of Radiation

The light of wavelength '\(\lambda\)' is incident on the surface of metal of work function \(\phi\) and emits the electron. The maximum velocity of electron emitted is [\(\mathrm{m}=\) mass of electron and \(\mathrm{h}=\) Planck's constant,...

28Dual Nature Of Radiation

When a photon enters glass from air, which one of the following quantity does not change?

29Dual Nature Of Radiation

On a photosensitive surface, if the intensity of incident radiation is increased, the stopping potential

30Dual Nature Of Radiation

Light of frequency two times the threshold frequency is incident on photosensitive material. If the incident frequency is made \(\left(\frac{1}{3}\right)^{\text {rd }}\) and intensity is doubled, then the photoelectric current will

31Dual Nature Of Radiation

A proton and alpha particle are accelerated through the same potential difference. The ratio of the de-Broglie wavelength of proton to that of alpha particle will be (mass of alpha particle is four times mass of proton.)

32Dual Nature Of Radiation

Photoemission from metal surface takes place for frequencies '\(v_1\)' and '\(v_2\)' of incident rays \(\left(v_1>v_2\right)\). Maximum kinetic energy of photoelectrons emitted is in the ratio \(1: \mathrm{K}\). The threshold frequency of m...

33Dual Nature Of Radiation

The wave number of the last line of the Balmer series in the hydrogen spectrum will be \(\left(\right.\) Rydberg's cons \(\left.\tan t, R=\frac{10^7}{\mathrm{~m}}\right)\)

34Dual Nature Of Radiation

When a photosensitive surface is irradiated by light of wavelengths '\(\lambda_1\)' and '\(\lambda_2\)', kinetic energies of emitted photoelectrons are 'E\(_1\)' and 'E\(_2\)' respectively. The work function of photosensitive surface is

35Dual Nature Of Radiation

When light of wavelength '\(\lambda\)' is incident on a photosensitive surface, photons of power 'P' are emitted. The number of photon 'n' emitted in time 't' is [h = Planck's constant, c = velocity of light in vacuum]

36Dual Nature Of Radiation

Photoelectrons are emitted when photons of energy \(4.2 ~\mathrm{eV}\) are incident on a photosensitive metallic sphere of radius \(10 \mathrm{~cm}\) and work function \(2.4 ~\mathrm{eV}\). The number of photoelectrons emitted before the em...

37Dual Nature Of Radiation

What is the additional energy that should be supplied to a moving electron to reduce its de Broglie wavelength from \(1 \mathrm{~nm}\) to \(0.5 \mathrm{~nm}\) ?

38Dual Nature Of Radiation

The graph of stopping potential $V_s$ against frequency $v$ of incident radiation is plotted for two different metals $P$ and $Q$ as shown in the graph. $\phi_p$ and $\phi_Q$ are work-functions of $P$ and $Q$ respectively, then

39Dual Nature Of Radiation

If the maximum kinetic energy of emitted electrons in photoelectric effect is $3.2 \times 10^{-19} \mathrm{~J}$ and the work-function for metal is $6.63 \times 10^{-19} \mathrm{~J}$, then stopping potential and threshold wavelength respecti...

40Dual Nature Of Radiation

The maximum velocity of the photoelectron emitted by the metal surface is \(v\). Charge and mass of the photoelectron is denoted by \(e\) and \(m\), respectively. The stopping potential in volt is

41Dual Nature Of Radiation

Energy of the incident photon on the metal surface is \(3 W\) and then \(5 W\), where \(W\) is the work function for that metal. The ratio of velocities of emitted photoelectrons is

42Dual Nature Of Radiation

The graph of kinetic energy against the frequency \(v\) of incident light is as shown in the figure. The slope of the graph and intercept on \(X\)-axis respectively are

43Dual Nature Of Radiation

The light of wavelength \(\lambda\) incident on the surface of metal having work function \(\phi\) emits the electrons. The maximum velocity of electrons emitted is [ \(c=\) velocity of light, \(h=\) Planck's constant, \(m=\) mass of electr...

44Dual Nature Of Radiation

When certain metal surface is illuminated with a light of wavelength $\lambda$, the stopping potential is $V$, When the same surface is illuminated by light of wavelength $2 \lambda$, the stopping potential is $\left(\frac{V}{3}\right)$. Th...

45Dual Nature Of Radiation

The stopping potential of the photoelectrons, from a photo cell is

46Dual Nature Of Radiation

When photons of energy $h v$ fall on a metal plate of work function ' $W_0$ ', photoelectrons of maximum kinetic energy ' $K$ ' are ejected. If the frequency of the radiation is doubled, the maximum kinetic energy of the ejected photoelectr...

47Dual Nature Of Radiation

The maximum velocity of the photoelectron emitted by the metal surface is ' $v$ '. Charge and mass of the photoelectron is denoted by ' $e$ ' and ' $m$ ' respectively. The stopping potential in volt is

48Dual Nature Of Radiation

A metal surface is illuminated by light of given intensity and frequency to cause photoemission. If the intensity of illumination is reduced to one fourth of its original value then the maximum KE of the emitted photoelectrons would be