Home
News
Colleges
Courses
Admission
Lectures
Online Test
Past Papers
Date Sheets
Results
Study Abroad
Jobs
Tutors
More
Apps
.jpg)
MCQ's Test For Physics ECAT Pre Engineering Chapter 20 Atomic Spectra
Try The MCQ's Test For Physics ECAT Pre Engineering Chapter 20 Atomic Spectra
-
Total Questions15
-
Time Allowed20
Physics ECAT Pre Engineering Chapter 20 Atomic Spectra
00:00
Question # 1
The results of spectra obtained by Blamer were expressed in 1896 by
Question # 2
The He-Ne laser discharge tube is filled with:
Question # 3
Laser is a beam of:
Question # 4
We can excite an atom by
Question # 5
CT scanning is the abbreviated name of
Question # 6
Lyman series in the spectrum of hydrogen exists in the :
Question # 7
Atoms of hydrogen gas can be excited by passing electric current through it when the gas is filled into the discharge tube at a pressure which is
Question # 8
By CAT scans, we can detect the density difference of the order of:
Question # 9
Selenium is:
Question # 10
The process of formation of spectrum is called:
Question # 11
Consider a photon of continuous X-ray and a photon of characteristics X-ray of same wavelength. Which of the following is/are different for the two photons
Question # 12
The inkjet printer eject a thin stream of:
Question # 13
Gaussian surface is always:
Question # 14
The formula of Brackett series can be obtained by putting in the general formula, the value of n equal to:
Question # 15
The transitions of electrons in the hydrogen atom result in the emission of spectral lies in the:
Top Scorers Of Physics ECAT Pre Engineering Chapter 20 Atomic Spectra MCQ`s Test
-
A Arian Ahmed 12 - Mar - 2024 00 Min 03 Sec 60/60 -
F Farzand Shah Farzand Shah 01 - Jun - 2024 00 Min 44 Sec 60/60 -
S suzi 11 - Feb - 2026 00 Min 45 Sec 60/60 -
B Bilal Javed 07 - Mar - 2024 01 Min 33 Sec 60/60 -
H Huzaifa Asim 26 - May - 2024 13 Min 32 Sec 60/60 -
M M Umer Arain 24 - Dec - 2024 00 Min 07 Sec 55/60 -
A Anibullah Anib 07 - Mar - 2024 01 Min 57 Sec 55/60 -
T Tamshi Sohail 03 - May - 2024 02 Min 37 Sec 55/60 -
C Chhabibullah1492 Habib 07 - Mar - 2024 05 Min 43 Sec 55/60 -
M Malaika Waqar 23 - Apr - 2024 06 Min 21 Sec 55/60 -
S Shamshad 27 - May - 2024 01 Min 13 Sec 50/60 -
S Sammad Ali 30 - May - 2024 01 Min 20 Sec 50/60 -
A Ayesha Ch 06 - Mar - 2024 01 Min 33 Sec 50/60 -
M m imran 18 - May - 2024 02 Min 16 Sec 50/60 -
C Computer mail 28 - Apr - 2026 03 Min 26 Sec 48/60
ECAT Physics Chapter 20 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | The value of the metastable state for Neon is |
A. 20.66eV
B. 20.61eV
C. 19.23eV
D. 18.70eV
|
| 2 | Ultraviolet region lies in ______ series |
A. Layman
B. Balmer
C. P fund
D. B racket
|
| 3 | The holes created in the L and M shells are occupied by transitions of: |
A. Electrons from lower states
B. Electrons from higher state
C. Positrons from higher states
D. Electrons from K shell
|
| 4 | The lasing or active medium in He-Ne laser discharge tube is: |
A. Nitrogen
B. Helium
C. Hydrogen
D. Neon
|
| 5 | Atoms of hydrogen gas can be excited by passing electric current through it when the gas is filled into the discharge tube at a pressure which is |
A. Less than atmospheric pressure
B. Much less than atmospheric pressure
C. Greater than atmospheric pressure
D. Much greater than atmospheric pressure
|
| 6 | An electron of the hydrogen atom in the second orbit is called its: |
A. Ground state
B. Excited state
C. Ionized state
D. Any of these
|
| 7 | CT scanning is the abbreviated name of |
A. Computed Technology
B. Computed Technique
C. Computed Technology
D. Computerized Technique
|
| 8 | Laser is a beam of: |
A. Visible light
B. Infra red light
C. Ultra violet light
D. Violet light only
|
| 9 | Photons must have energy equal to |
A. ev
B. En
C. hf
D. None of these
|
| 10 | The inkjet printer eject a thin stream of: |
A. Water
B. Oil
C. Ink
D. Any above
|
Test Questions
Share your comments & questions here
Salmankhan
01 Feb 2018Some mcqs having wrong answers.