12th class Physics chapter 20 online mcq test with answers for ICS part 2 Physics Chapter 20 (Atomic Spectra)

2nd Year Physics Chapter 20 Online MCQ Test for 12th Class Physics Chapter 20 (Atomic Spectra)

This online test contains MCQs about following topics:

- Atomic Spectra
- Bohr's Model of the Hydrogen Atom
- Inner Shell Transitions and Characteristic X-Rays
- Uncertainty Within the Atom
- Laser

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Ics Part 2 Physics Chapter 20 Test

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2nd Year Physics Chapter 20 Online MCQ Test for 12th Class Physics Chapter 20 (Atomic Spectra)

Sr. #	Questions	Answers Choice
1	Photons emitted in inner shell transition are.	A. Continuous X -rays B. Discontinuous X rays C. Characteristic X rays D. Energetic X rays
2	Energy produced due to fission of uranium atom is:	A. 500MeV B. 200MeV C. 700MeV D. 750MEV
3	The rest mass x ray photon is	A. Infinite B. Zero C. 1.67 X<sup>-17</sup> kg D. All of the above
4	Frequency of x-rays depends upon.	A. Number of electrons striking target B. Accelerating potencial C. Nature of the target D. Both B and C
5	The 1<sup>st</sup> Bohr atom in the hydrogen atom has radius	A. 3.56 x 10<sup>-10</sup> m B. 0.053 x 10<sup>-11</sup> m C. 0.53 x 10<sup>-11</sup> m D. 5.30 x 10<sup>-11</sup> m
6	Which series lies in the ultraviolet region.	A. Balmer series B. Bracket series C. Ptund series D. Lyman series
7	Boher proposed his atomic model in:	A. 1910 B. 1911 C. 1912 D. 1913
8	Which of the following series of hydrogen spectrum lies in ultra violet region.	A. Lyman sereis B. Paschen series C. Balmar series D. Bracket series
9	The value of Rydberg constant is:	A. 1.0749x10<sup>7</sup>m<sup>-1</sup> B. 1.0974 x 10<sup>7</sup> m<sup>-1</sup> C. 1.974 x10<sup>6</sup>m<sup>-1</sup> D. 1.0974 x 10<sup>-7</sup> m<sup>-1</sup>
10	Black Body radiation spectrum is an example of:	A. Atomic spectra B. Line spectra C. Continuous spectra D. None of above

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