CBSE 12th Standard Physics Subject Dual Nature of Radiation and Matter HOT Questions 2 Mark Questions 2021
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CBSE 12th Standard Physics Subject Dual Nature of Radiation and Matter HOT Questions 2 Mark Questions 2021
12th Standard CBSE
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Reg.No. :
Physics
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A proton and an \(\alpha \) particle are accelerated through the same potential. Which one of the two has
(i) greater value of de-Broglie wavelength associated with it and
(ii) less kinetic energy? Give reasons to justify your answer.(a) -
Find the ratio of the de-Broglie wavelength associated with protons accelerated through a potential of 128 V and a particles accelerated through a potential of 64 V.
To calculate the ratio of de-Baroglie wavelength of two particle find the ratio in terms of symbols and then put the given numerical values.(a) -
What is the
(i) momentum
(ii) speed
(iii) de-Broglie wavelength of an electron with kinetic energy of 120 eV?(a) -
X-rays fall on a photosensitive surface to cause photoelectric emission. Assuming that the work function of the surface can be neglected, find the relation between the de-Broglie wavelength (\(\lambda \)) of the electrons emitted to the energy (Ev) of the incident photons. Draw the nature of the graph for Aas a function of Ev.
(a)
