Dual Nature of Radiation and Matter PYQs - Last 10 Years

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Practice 29 NEET Physics questions from Dual Nature of Radiation and Matter. Use the year-wise and type-wise breakdown to prioritize recent PYQs, then continue into the question list below.

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Last 10 Years Dual Nature of Radiation and Matter Questions

Showing 29 of 29 filtered questions.

1Dual Nature Of Radiation And Matter

A beam of light falls on a metal surface such that photo-electrons are generated. If power of the light source starts to decrease linearly with time $t$, then variation of the photocurrent $I$ and magnitude of the stopping potential $|V|$ w...

2Dual Nature Of Radiation And Matter

A ray of light with wavelength $\lambda$ is incident on three different photoelectric cells namely 1,2 and 3 . The threshold wavelength of these photoelectric cells are $\lambda_1, \lambda_2$, and $\lambda_3$, respectively and the magnitude...

3Dual Nature Of Radiation And Matter

A photon and an electron, each of 20 eV energy, move in free space. The ratio of linear momentum of electron $\mathrm{p}_{\mathrm{e}}$ to that of photon $\mathrm{p}_{\mathrm{Ph}}, \frac{\mathrm{p}_{\mathrm{e}}}{\mathrm{p}_{\mathrm{Ph}}}$ is...

4Dual Nature Of Radiation And Matter

For a metal of work function 6.6 eV , which of the following wavelengths of incident radiation does not give rise to the photoelectric effect?
(Take Planck's constant as $6.6 \times 10^{-34} \mathrm{~J} \mathrm{~s}$ )

5Dual Nature Of Radiation And Matter

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6Dual Nature Of Radiation And Matter

Which of the following options represent the variation of photoelectric current with property of light shown on the x-axis?

7Dual Nature Of Radiation And Matter

De-Broglie wavelength of an electron orbiting in the $n=2$ state of hydrogen atom is close to
(Given Bohr radius $=0.052 \mathrm{~nm}$ )

8Dual Nature Of Radiation And Matter

A photon and an electron (mass $m$ ) have the same energy $E$. The ratio ( $\lambda_{\text {photon }} / \lambda_{\text {electron }}$ ) of their de Broglie wavelengths is: ( $c$ is the speed of light)

9Dual Nature Of Radiation And Matter

If \(\phi\) is the work function of photosensitive material in \(\mathrm{eV}\) and light of wavelength of numerical value \(\lambda=\frac{h c}{e}\) metre, is incident on it with energy above its threshold value at an instant then the maximu...

10Dual Nature Of Radiation And Matter

An electron and an alpha particle are accelerated by the same potential difference. Let \(\lambda_e\) and \(\lambda_\alpha\) denote the de-Broglie wavelengths of the electron and the alpha particle, respectively, then:

11Dual Nature Of Radiation And Matter

The graph which shows the variation of \(\left(\frac{1}{\lambda^2}\right)\) and its kinetic energy, \(E\) is (where \(\lambda\) is de Broglie wavelength of a free particle):

12Dual Nature Of Radiation And Matter

If \(c\) is the velocity of light in free space, the correct statements about photon among the following are:
A. The energy of a photon is \(E=h v\).
B. The velocity of a photon is \(c\).
C. The momentum of a photon, \(p=\frac{h v}{c}\).
D....

13Dual Nature Of Radiation And Matter

The maximum kinetic energy of the emitted photoelectrons in photoelectric effect is independent of:

14Dual Nature Of Radiation And Matter

The de Broglie wavelength associated with an electron, accelerated by a potential difference of 81 V is given by:

15Dual Nature Of Radiation And Matter

The minimum wavelength of \(X\)-rays produced by an electron accelerated through a potential difference of \(V\) volts is proportional to :

16Dual Nature Of Radiation And Matter

The work functions of Caesium \((\mathrm{Cs})\), potassium \((\mathrm{K})\) and Sodium (Na) are \(2.14 ~\mathrm{eV}, 2.30 ~\mathrm{eV}\) and \(2.75 ~\mathrm{eV}\) respectively. If incident electromagnetic radiation has an incident energy of...

17Dual Nature Of Radiation And Matter

The threshold frequency of a photoelectric metal is v0. If light of frequency 4v0 is incident on this metal, then the maximum kinetic energy of emitted electrons will be :

18Dual Nature Of Radiation And Matter

The light rays having photons of energy 4.2 eV are falling on a metal surface having a work function of 2.2 eV. The stopping potential of the surface is

19Dual Nature Of Radiation And Matter

When two monochromatic lights of frequency, v and \({v \over 2}\) are incident on a photoelectric metal, their stopping potential becomes \({{{V_s}} \over 2}\) and Vs respectively. The threshold frequency for this metal is

20Dual Nature Of Radiation And Matter

An electromagnetic wave of wavelength '\(\lambda\)' is incident on a photosensitive surface of negligible work function. If 'm' mass is of photoelectron emitted from the surface has de-Broglie wavelength \(\lambda\)d, then :

21Dual Nature Of Radiation And Matter

The number of photons per second on an average emitted by the source of monochromatic light of wavelength 600nm, when it delivers the power of 3.3 \(\times\) 10\(-\)3 watt will be : (h = 6.6 \(\times\) 10\(-\)34 Js)

22Dual Nature Of Radiation And Matter

Light with an average flux of 20 W/cm2 falls on a non-reflecting surface at normal incidence having surface area 20 cm2. The energy received by the surface during time span of 1 minute is :

23Dual Nature Of Radiation And Matter

Light of frequency 1.5 times the threshold frequency is incident on a photosensitive material. What will be the photoelectric current if the frequency is halved and intensity is doubled?

24Dual Nature Of Radiation And Matter

An electron is accelerated from rest through a potential difference of V volt. If the de-Broglie wavelength of the electron is 1.227 \(\times\) 10-2 nm, the potential difference is :

25Dual Nature Of Radiation And Matter

An electron is accelerated through a potential difference of 10,000 V. Its de Broglie wavelength is (nearly) : (me = 9 \(\times\) 10–31 kg)

26Dual Nature Of Radiation And Matter

An electron of mass m with an initial velocity
\(\overrightarrow v = {v_0}\widehat i\) (v0 > 0)
enters an electric field
\(\overrightarrow E = - {\overrightarrow E _0}\widehat i\)
(E0
= constant > 0) at t = 0. If \(\lambda\)0
is its ...

27Dual Nature Of Radiation And Matter

When the light of frequency 2\({\upsilon _0}\)
(where \({\upsilon _0}\)
is
threshold frequency), is incident on a metal
plate, the maximum velocity of electrons
emitted is v1
. When the frequency of the
incident radiation is increased to ...

28Dual Nature Of Radiation And Matter

The de-Broglie wavelength of a neutron in thermal equilibrium with heavy water at a temperature T (kelvin) and mass m, is

29Dual Nature Of Radiation And Matter

The photoelectric threshold wavelength of silver is 3250 \(\times\) 10\(-\)10 m. The velocity of the electron ejected from a silver surface by ultraviolet light of wavelength 2536 \(\times\) 10\(-\)10 m is
{Given h = 4.14 \(\times\) ...

MCQM+4 / -12017