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Class 12
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Physics
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Dual Nature of Radiation and Matter
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Medium Questions
Dual Nature Of Radiation And Matter
Physics
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Choose the correct statement
A
Any charged particle in rest is accompanied by matter waves.
B
Any uncharged particle in rest is accompanied by matter waves.
C
The matter waves are waves of zero amplitude.
D
The matter waves are waves of probability amplitude.
Medium
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Which of the following particles - neutron, proton,electron and deuteron has the lowest energy if all have the same de Broglie wavelength:
A
neutron
B
proton
C
electron
D
deuteron
Medium
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With the decrease in the wave length of the incident radiation the velocity of the photoelectrons emitted from a given metal
A
Remains same
B
Increases
C
Decreases
D
Increases first and then decreases
Medium
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The deBroglie wavelength associated with a particle of mass m, moving with a velocity
$_{′}v_{′}$
and energy E is given by
A
$mv_{2}h $
B
$h_{2}mv $
C
$2mE h $
D
$2mE /h$
Medium
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An electron of charge 'e' and mass 'm' is accelerated from rest by a potential difference 'V'. The de Broglie wavelength is
A
Directly proportional to the square root of potential difference.
B
Inversely proportional to the square root of potential difference
C
Directly proportional to the square root of electron mass
D
Inversely proportional to the cube root of electron mass
Medium
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In photo-electric effect, when photons of energy
$_{′}hv_{′}$
are incident on a metal surface, electrons are emitted with some kinetic energy. It is possible to say that
A
All ejected electrons have same K.E. equal to
$hv_{0}$
B
The ejected electrons have a distribution of K.E. from zero to
$hv−hv_{0}$
C
The most energetic electrons have K.E. equal to
$hv$
D
All ejected electrons have K.E. equal to
$hv$
Medium
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An electron of mass
$9.1×10_{−31}$
kg and charge
$1.6×10_{−19}$
C is accelerated through a potential difference of 'V' volt. The de Broglie wavelength
$(λ)$
associated with the electron is
A
$V 12.27 A_{0}$
B
$V12.27 A_{0}$
C
$12.27V A_{0}$
D
$12.27V 1 A_{0}$
Medium
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The de Broglie wavelength of a molecule of thermal energy KT (K is Boltzmann constant and T is absolute temperature) is given by :
A
$2mKT h $
B
$2mKTh $
C
$h2mKT $
D
$h2mKT 1 $
Medium
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The graph between the de Broglie wavelength and the momentum of a photon is a
A
Rectangular hyperbola
B
Circle
C
Parabola
D
Straight line
Medium
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A cathode ray particle is accelerated from rest through a potential difference of 'V' volt. Speed of the particle is
A
$m2eV $
B
$eVm $
C
$meV $
D
$m4eV $
Medium
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