×
20th Chapter

12th Class Physics Chapter 20 Test

Here you can prepare 12th Class Physics Chapter 20 Atomic Spectra Test. Click the button for 100% free full practice test.

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
ic

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

Sr. # Questions Answers Choice
1 1 rad =
  • A. 0.001Gy
  • B. 0.01Gy
  • C. 0.1Gy
  • D. 1.01Gy
2 The first orbit in the hydrogen atom has a radius.
  • A. 0.53 nm
  • B. 0.053 nm
  • C. 0.0053 nm
  • D. 0.00053 nm
3 Helium Neon Laser Beam emitted from discharge tube has a colour.
  • A. Blue
  • B. Green
  • C. Red
  • D. Black
4 The series in visible region is:
  • A. Balmer series
  • B. Pfund series
  • C. Paschen series
  • D. None of above
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 When an electron in an atom goes from a lower to higher orbit its:
  • A. K.E increases , P.E decreases
  • B. K.E increases , P.E increases
  • C. K.E decreases , P.E increases
  • D. K.E decreases , P.E decreases
7 The series in infrared region is:
  • A. Paschen series
  • B. Bracket series
  • C. Pfund series
  • D. All of above
8 The shortest wave length is Bracket series has wave length.
  • A. 16/Rn
  • B. Rn/16
  • C. 16 Rn
  • D. 4 Rn
9 The idea of laser device was first introduced by C.H. Towners and Authers Schowlan is
  • A. 1972
  • B. 1965
  • C. 1958
  • D. 1913
10 Laser is a device which can produce:
  • A. Intense beam of light
  • B. Coherant beam of light
  • C. Monochromatic beam of light
  • D. All of the above

Top Scorers of Ics Part 2 Physics Chapter 9 Test Online

D

Dazzlee

Lahore17 - Jul - 2022

16/17
01 Mins 05 Sec

Shahkhalid

Islamabad04 - Oct - 2022

16/17
02 Mins 42 Sec

Shahkhalid

Islamabad04 - Oct - 2022

16/17
03 Mins 03 Sec
D

Dazzlee

Lahore17 - Jul - 2022

15/17
01 Mins 22 Sec
H

Hm

Lahore30 - Jul - 2022

15/17
02 Mins 32 Sec
S

Sobia Babar

Lahore05 - Sep - 2022

15/17
03 Mins 12 Sec
D

Dazzlee

Lahore17 - Jul - 2022

14/17
01 Mins 22 Sec
A

Attiqshah Shah

Lahore21 - Aug - 2022

14/17
02 Mins
M

Mirza Shahzaib Shahid

Rawalpindi01 - Sep - 2022

14/17
03 Mins 40 Sec
D

Dazzlee

Lahore17 - Jul - 2022

13/17
01 Mins 39 Sec
H

Hm

Lahore30 - Jul - 2022

13/17
02 Mins 17 Sec
H

Hm

Lahore30 - Jul - 2022

13/17
02 Mins 25 Sec
A

Ayesha Shahid

Lahore12 - Sep - 2022

13/17
02 Mins 41 Sec
A

Ayesha Shahid

Lahore12 - Sep - 2022

13/17
04 Mins 53 Sec
D

Dazzlee

Lahore17 - Jul - 2022

12/17
01 Mins 40 Sec

Share your comments questions here
Sort By:
X

Sign in

to continue to ilmkidunya.com

inquiry-image

Free Admission Advice

Fill the form. Our admission consultants will call you with admission options.

X

Sign in

to continue to ilmkidunya.com

X

Sign in

to continue to ilmkidunya.com

X

Forgot Password

to continue to ilmkidunya.com

X

Register Type

Please Provide following information to Register

  • Student
  • Tutor
  • Consultant
  • Employer