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	First spectral series of hydrogen atom was discovered by	A. Lyman B. Rydberg C. Balmer D. Paschen
2	X-rays were discovered by	A. Curie B. Henry Becquerel C. Rontgen D. None of these
3	Laser can be made by creating.	A. Meta stable B. Population inversion C. Excited state D. All of these
4	The Balmer series is obtained when all the transition of electrons terminate on	A. 1<sup>st</sup> orbit B. 2nd orbit C. 3rd orbit D. 4th orbit
5	For Paschen series, the value of 'n' starts from	A. 2 B. 4 C. 6 D. 8
6	For an atom of hydrogen atom the radius of the first orbit is given by:	A. H/me<sup>2</sup> B. me/4h<sup>2</sup> C. h2/4<span style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 16px;">π<sup>2</sup> kme<sup style="">2</sup></span> D. h<sup>2</sup> me<sup>2</sup>
7	Black Body radiation spectrum is an example of:	A. Atomic spectra B. Line spectra C. Continuous spectra D. None of above
8	An electron in H -atom is excited from ground state n=4 , How many spectral lines are possible in this case.	A. 6 B. 5 C. 4 D. 3
9	The longest wavelength of Paschen series is.	A. 656 nm B. 1094 nm C. 1875 nm D. 2000 nm
10	Which is not characteristic of Laser.	A. Monochromatic B. Coherent C. Intense D. Multi direction

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