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	Which is not characteristic of Laser.	A. Monochromatic B. Coherent C. Intense D. Multi direction
2	Study of hydrogen visible spectrum in	A. 1886 B. 1887 C. 1895 D. 1885
3	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>
4	The value of Rydberg constant is	A. 1.0974 x 10<sup>7</sup> m<sup>-1</sup> B. 1.0974 x 10<sup>-7</sup> m<sup>-1</sup> C. 1.0974 x 10<sup>6</sup> m<sup>-1</sup> D. 1.0974 x 10<sup>-6</sup> m<sup>-1</sup>
5	Black Body radiation spectrum is an example of:	A. Atomic spectra B. Line spectra C. Continuous spectra D. None of above
6	The series in infrared region is:	A. Paschen series B. Bracket series C. Pfund series D. All of above
7	Radius of first Bohr's orbit is.	A. 0.053 nm B. 0.053 mm C. 0.053 micro meter D. 0.053 m
8	_____ has the largest de Broglie wavelength at same speed.	A. Proton B. Alpha particle C. Carbon atom D. Electron
9	Helium-Neon laser discharge tube contains neon	A. 82% B. 15% C. 25% D. 85%
10	Radius of first orbit of an atom is r1= 0.053 nm, Radius of second orbit r2 will be.	A. 0.106 nm B. 0.212 nm C. 0.053 nm D. 0.53 x 10<sup><a href="null">-10</a></sup> nm

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