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
Static electricity is produced by the transfer of:
Question # 2
Tick the series which lies in the visible region:
Question # 3
The range of wavelengths of colurs in the visible colours is
Question # 4
The He-Ne laser discharge tube is filled with:
Question # 5
By CAT scans, we can detect the density difference of the order of:
Question # 6
The process of formation of spectrum is called:
Question # 7
If the distance between two charges is doubled,the force between them will become:
Question # 8
In helium Neon Laser Neon = 15% and Helium = 85% used. The lasing gas this unit is
Question # 9
The inkjet printer eject a thin stream of:
Question # 10
The electric field lines start from:
Question # 11
A metastable stae:
Question # 12
The results of spectra obtained by Balmer were expressed in 1896 by:
Question # 13
The photocopying process is called:
Question # 14
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 # 15
We can excite an atom by
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 -
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 -
F Fizza Khalid 03 - Mar - 2024 01 Min 13 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 -
A Abdullah Zubair 11 - Jan - 2025 03 Min 10 Sec 45/60
ECAT Physics Chapter 20 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | Energy required by an electron revolving in certain orbit to jump to an excited state is called: |
A. Ionization energy
B. Ionization potential
C. Excitation energy
D. Excitation potential
|
| 2 | The life time of metastable state is equal to |
A. Life time of excited state
B. Greater than by excited state
C. Zero
D. Less than by excited state
|
| 3 | The results of spectra obtained by Balmer were expressed in 1896 by: |
A.
Bohr
B. Rydberg
C. Planck
D. Rutherford
|
| 4 | We can excite an atom by |
A. Bombardment of particles
B. Radiating photons
C. Providing potential difference
D. All answer are true
|
| 5 | Spectrum represents the number of component colours present in certain light in terms of: |
A. Wavelength
B. Frequency
C. Energy
D. Both (A) and (B)
|
| 6 | X-rays produced in a tube operating at 105V. The speed of X-rays produced is |
A. 3 x 108m/s
B. 3.1 x 108m/s
C. 2.8 x 108m/s
D. 1.88 x 108m/s
|
| 7 | The results of spectra obtained by Blamer were expressed in 1896 by |
A. Bohr
B. Rydberg
C. Planck
D. Rutherford
|
| 8 | 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
|
| 9 | The lasing or active medium in He-Ne laser discharge tube is: |
A. Nitrogen
B. Helium
C. Hydrogen
D. Neon
|
| 10 | Balmer series was identified in: |
A. 1685
B. 1785
C. 1885
D. 1985
|
Test Questions
Share your comments & questions here
Salmankhan
01 Feb 2018Some mcqs having wrong answers.