Assignment Details

Dual Nature of Radiation and Matter

10089 minutes

Mar 29, 6:51 AM

46.0 marks

MCQ

24 questions

Anil Kumar

I Have done M.Sc. in Physics, B.Ed. CTET Qualified. Currently pursuing Ph.D. in Physics

Class Details

Physics

Class 12

Physics

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Question Text

Question 2 :
The de-Broglie wavelength associated with a particle with rest mass $m_0$ and moving with speed of light in vacuum is ___________.

Question 3 :
The value of de Broglie wavelength of an electron moving with a speed of $6.6 \times 10^{5} ms^{-1}$ is approximately

Question 5 :
A particle of mass M at rest decays into two masses$\displaystyle { m }_{ 1 }$ and$\displaystyle { m }_{ 2 }$ with non zero velocities. The ratio of de-Broglie wavelengths of the particles$\displaystyle \frac { { \lambda }_{ 1 } }{ { \lambda }_{ 2 } }$ is:

Question 8 :
The de-Broglie wavelength associated with with the particle of mass $m$ moving with velocity $v$ is 

Question 9 :
If h is Plancks constant, the momentum of a photon of wavelength 0.01 $A^o$ is

Question 10 :
Assertion: The de Broglie equation has significance for any microscopic or sub-microscopic particles. Reason: The de Broglie wavelength is inversely proportional to the mass of the object if velocity is constant.

Question 11 :
In a grease spot photometer, light from a lamp with dirty chimney is exactly balanced by a point source distant $10$ cm from the grease spot. On clearing the chimney, the point source is moved $2$ cm to obtain balance again. The percentage of light absorbed by the dirty chimney is nearly

Question 13 :
Which of the following is dependent on the intensity of incident radiation in a photoelectric experiment?

Question 14 :
A proton when accelerated through a potential difference of V volt has wavelength $\lambda$  associated with it .An electron to have the same $\lambda$  must be accelerated through a p.d of

Question 15 :
The wavelength corresponding to a beam of electrons whose kinetic energy is 100 eV is  ($h=6.6\times 10^{-34}$ Js, $1eV=1.6\times10^{-19}J$ J,$m_{e}= 9.1 \times 10^{-31}$ kg)

Question 16 :
The hydrogen atom emits a photon of 656.3 nm line. Find the momentum of the photon associated with it.

Question 17 :
The speed of an electron having a wavelength of ${ 10 }^{ -10 }m$ is

Question 18 :
The energy of a photon is $3\times{10}^{-12}$ ergs. What is its wavelength in $nm$ ?  $[h=6.62 \times 10^{-27}\ erg,\ c=3\times 10^{10}\ cm/s]$

Question 19 :
For moving ball of cricket, the correct statement about de-Broglie wavelength is

Question 20 :
The photoelectric threshold wavelength of silver is $3250\times { 10 }^{ -10 }m$ The velocity of the electron ejected from a silver surface by ultravioet light of wavelength $2536\times { 10 }^{ -10 }m$ is:

Question 21 :
Light of wavelength $500\ nm$is incident on a metal with a work function $2.28\ eV$. The de Borglie wavelength of the emitted electron is:

Question 22 :
The de-Broglie wavelength of a neutron at $927^{0}$C is$\lambda$. Its wavelength at $27^{0}$C is:

Question 23 :
If we assume that penetrating power of any radiation/particle is inversely proportional to the De-broglie wavelength of the particle, then

Question 24 :
If a hydrogen atom at rest, emits a photon of wavelength $\lambda ,$ the recoil speed of the atom of mass $'m'$ is given by

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