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

Ics Part 2 Physics Chapter 20 Test

Sr. #	Questions	Answers Choice
1	Life time of metastable states is	A. 10<sup>-6</sup> sec or more B. 10<sup>-3</sup> sec or more C. 10<sup>-5</sup> sec or more D. None of these
2	The typical nuclei are less than:	A. 10<sup>-16</sup>m B. 10<sup>-14</sup>m C. 10<sup>-12</sup>m D. 10<sup>-10</sup>m
3	The line radiations emitted from by hydrogen filled discharge tube can be analyzed into.	A. Band spectrum B. Line spectrum C. Continuous spectrum D. Absorption spectrum
4	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
5	Balmer series lies in	A. Visible region B. Invisible region C. Ultraviolet region D. Infrared region
6	Earth orbital speed is	A. 10 km/s B. 20 km/s C. 30 km/s D. 40 km/s
7	Which of the following is one of the spectral series of atomic hydrogen?	A. Brockett series B. Balmer series C. P fund series D. All of above
8	Black Body radiation spectrum is an example of:	A. Atomic spectra B. Line spectra C. Continuous spectra D. None of above
9	1 rem =	A. 0.001 SV B. 0.01 SV C. 0.1 SV D. 1.01 SV
10	The velocity of electron moving is 1st orbit of hydrogen atom is:	A. 2.09 x 10<sup>6</sup> ms<sup>-1 </sup> B. 2.18 x10<sup>6</sup> ms<sup>-1</sup> C. 2.19 x 10<sup>6</sup> ms<sup>-1</sup> D. 3.18 x10<sup>6</sup> ms<sup>-1</sup>

Lahore06 - Aug - 2024

12/17

01 Mins 43 Sec

Lahore01 - Oct - 2024

11/17

04 Mins 42 Sec

Lahore06 - Aug - 2024

10/17

01 Mins 51 Sec

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