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Atomic Physics Theory MCQ - Multiple Choice Question and Answer

Atomic Physics Theory MCQ with detailed explanation for interview, entrance and competitive exams. Explanation are given for understanding.

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Question No : 1
The mass of an electron in motion depends upon:

direction of motion
its velocity
its velocity of e-
it's shell number

Question No : 2
The mass and energy equivalent to 1 a.m.u. respectively are :

1.67 x 10-27 g, 9.30 MeV
1.67 x 10-27 kg, 930 MeV
1.67 x 10-27 kg, 1 MeV
1.67 x 10-34 kg, 1 MeV

Question No : 3
It is given for the azimuthal quantum number l = 3, the total number of different possible values of the magnetic azimuthal quantum number, ml is :

3
7
4
5

Question No : 4
The acceleration of electron in the first orbit of hydrogen atom is:

4π2mh3
h24π2mr
h24π2m2r3
m2h24π2r3

Question No : 5
If the electron in a hydrogen atom jumps from an orbit level n1 = 3 to an orbit level n2 = 2, the emitted radiation has a wavelength given by :

λ=365R
λ=5R36
λ=6R
λ=R6

Question No : 6
Number of electrons that constitute one ampere of current is :

265x1016
625x1012
4.8 x 1010
625x1016

Question No : 7
The angular momentum of electron in hydrogen atom is proportional to :

r
1r
r2
1r