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List of top Physics Questions on Dual nature of matter asked in NEET (UG)
Light with an average flux of
$20\,\Omega/cm^2$
falls on a non-reflecting surface at normal incidence having surface area
$20\,cm^2$
. The energy received by the surface during time span of
$1\,minute$
is :
NEET (UG) - 2020
NEET (UG)
Physics
Dual nature of 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 :
NEET (UG) - 2020
NEET (UG)
Physics
Dual nature of 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?
NEET (UG) - 2020
NEET (UG)
Physics
Dual nature of matter
When a metallic surface is illuminated with radiation of wavelength
$\lambda$
, the stopping potential is V. If the same surface is illuminated with radiation of wavelength
$2 \lambda$
, the stopping potential is
$\frac{V}{4}$
. The threshold wavelength for the metallic surface is :
NEET (UG) - 2016
NEET (UG)
Physics
Dual nature of matter
Light of wavelength 500 nm is incident on a metal with work function 2.28 eV. The de Broglie wavelength of the emitted electron is
NEET (UG) - 2015
NEET (UG)
Physics
Dual nature of matter
When the energy of the incident radiation is increased by
$20 \%, $
the kinetic energy of the photoelectrons emitted from a metal surface increased from 0.5 eV to 0.8 eV. The work function of the metal is
NEET (UG) - 2014
NEET (UG)
Physics
Dual nature of matter
The wavelength
$\lambda_e$
of an electron and
$\lambda_P$
of a photon of same energy E are related by:
NEET (UG) - 2013
NEET (UG)
Physics
Dual nature of matter
If the momentum of an electron is changed by P, then the de Broglie wavelength associated with it changes by
$0.5 \%. $
The initial momentum of electron will be
NEET (UG) - 2012
NEET (UG)
Physics
Dual nature of matter
In photoelectric emission process from a metal of work function
$1.8\, eV$
, the kinetic energy of most energetic electrons is
$0.5\, eV$
. The corresponding stopping potential is
NEET (UG) - 2011
NEET (UG)
Physics
Dual nature of matter
When monochromatic radiation of intensity
$I$
falls on a metal surface, the number of photoeleetrons and their maximum kinetic energy are
$N$
and
$T$
respectively. If the intensity of radiation is
$2I$
, the number of emitted electrons and their maximum kinetic energy are respectively
NEET (UG) - 2010
NEET (UG)
Physics
Dual nature of matter
In Thomson mass spectrograph
$\vec{E}\perp \vec{B} $
then the velocity of electron beam will be
NEET (UG) - 2001
NEET (UG)
Physics
Dual nature of matter
Which one among the following shows particle nature of light?
NEET (UG) - 2001
NEET (UG)
Physics
Dual nature of matter
Which of the following statement is correct?
NEET (UG) - 1997
NEET (UG)
Physics
Dual nature of matter