Home
News
Colleges
Courses
Admission
Lectures
Online Test
Past Papers
Date Sheets
Results
Study Abroad
Jobs
Tutors
More
Apps
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
By CAT scans, we can detect the density difference of the order of:
Question # 2
The transitions of electrons in the hydrogen atom result in the emission of spectral lies in the:
Question # 3
The shell closer to the nucleus is called:
Question # 4
The spectrum emitted from hydrogen filled discharge tube is:
Question # 5
The process of formation of spectrum is called:
Question # 6
If the distance between two charges is doubled,the force between them will become:
Question # 7
Graph of Black body radiation is example of
Question # 8
An electron of the hydrogen atom in the second orbit is called its:
Question # 9
Balmer series lies in that region of electromagnetic wave spectrum which is called:
Question # 10
Static electricity is produced by the transfer of:
Question # 11
In flesh, light element like carbon, hydrogen and oxygen predominate. Three elements allows ______ amount of incident X-ray to pass through them
Question # 12
The results of spectra obtained by Balmer were expressed in 1896 by:
Question # 13
The electric field lines start from:
Question # 14
X-rays produced in a tube operating at 105V. The speed of X-rays produced 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 | A metastable stae: |
A. Is an excited state
B. Is that in which excited electron is stable
C. Is that in which excited electron is usually unstable
D. Means a time interval of 10-8second
|
| 2 | The electric field lines start from: |
A. Positive charge
B. Negative charge
C. Either A and B
D. Neutron
|
| 3 | Coulomb multiplied by volt by volt gives the unit called: |
A. farad
B. Ohm
C. Second
D. joule
|
| 4 | Lyman series in the spectrum of hydrogen exists in the : |
A. Infra-red region
B. Visible region
C. Ultraviolet region
D. Both(A) and (B)
|
| 5 | Balmer series lies in that region of electromagnetic wave spectrum which is called: |
A. Visible region
B. Invisible region
C. Infra-red region
D. ultraviolet region
|
| 6 | In helium Neon Laser Neon = 15% and Helium = 85% used. The lasing gas this unit is |
A. Helium
B. Neon
C. Both
D. None of these
|
| 7 | If the distance between two charges is doubled,the force between them will become: |
A. Double
B. Half
C. One third
D. One fourth
|
| 8 | In flesh, light element like carbon, hydrogen and oxygen predominate. Three elements allows ______ amount of incident X-ray to pass through them |
A. Small
B. Greater
C. Equal
D. Sometimes
|
| 9 | The spectrum emitted from hydrogen filled discharge tube is: |
A. Line spectrum
B. Discrete spectrum
C. And spectrum
D. Absorption spectrum
|
| 10 | The natural arrangement of colours in the spectrum of white light spectrum is |
A. VIBGYOR
B. ROYBGIV
C. ROYBIGV
D. BIGROYV
|
Test Questions
