Class 11 Physics Paper UP Board. We covered all the Class 11 Physics Paper UP Board MCQs in this post for free so that you can practice well for the exam.
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Class 11 Physics Paper UP Board Objective for Students
De-Broglie wavelength of an electron beam accelerated through a potential difference of 60 volts is
a. 1.49 eV
b. 1.58 eV
c. 149 eV
d. 1.52 eV
Option a – 1.49 eV
For a non-relativistic free particle, the phase velocity is equal to
a. double the group velocity
b. half of the group velocity
c. group velocity
d. a quarter of the group velocity
Option c – group velocity
According to the Wilson-Sommerfeld quantization rule, only those orbits or stationary states are permissible in which the value of each phase integral is an integral multiple of
a. Planck’s constant
b. de-Broglie constant
c. Rydberg’s constant
d. None of the above
Option a – Planck’s constant
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