Home
News
Colleges
Courses
Admission
Lectures
Online Test
Past Papers
Date Sheets
Results
Study Abroad
Jobs
Tutors
More
Apps
.gif)
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 minimum wavelength of X-rays produced of 1KV potential difference is applied across the anode and cathode of the tube is
Question # 2
Energy required by an electron revolving in certain orbit to jump to an excited state is called:
Question # 3
The formula of Brackett series can be obtained by putting in the general formula, the value of n equal to:
Question # 4
Tick the series which lie/s in. the infra-red region.
Question # 5
CT scanning is the abbreviated name of
Question # 6
The life time of metastable state is equal to
Question # 7
Tick the series which lies in the visible region:
Question # 8
Spectrum represents the number of component colours present in certain light in terms of:
Question # 9
The transitions of electrons in the hydrogen atom result in the emission of spectral lies in the:
Question # 10
Laser is a beam of:
Question # 11
The process of formation of spectrum is called:
Question # 12
In case of braking radiations, when the rate of deceleration is very large, the emitted radiation corresponds to:
Question # 13
By CAT scans, we can detect the density difference of the order of:
Question # 14
The lasing or active medium in He-Ne laser discharge tube is:
Question # 15
The value of the metastable state for Neon is
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 | Braking radiation causes: |
A. Continuous spectrum
B. Line Spectrum
C. Band spectrum
D. Discrete specturm
|
| 2 | Photons must have energy equal to |
A. ev
B. En
C. hf
D. None of these
|
| 3 | In case of braking radiations, when the rate of deceleration is very large, the emitted radiation corresponds to: |
A. Short wavelength
B. Large wavelength
C. Very large wavelenth
D. Low frequency
|
| 4 | The spectrum emitted from hydrogen filled discharge tube is: |
A. Line spectrum
B. Discrete spectrum
C. And spectrum
D. Absorption spectrum
|
| 5 | The inkjet printer eject a thin stream of: |
A. Water
B. Oil
C. Ink
D. Any above
|
| 6 | We can excite an atom by |
A. Bombardment of particles
B. Radiating photons
C. Providing potential difference
D. All answer are true
|
| 7 | 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
|
| 8 | The He-Ne laser discharge tube is filled with: |
A. 85% He
B. 15% He
C. 50% He
D. 60% He
|
| 9 | The results of spectra obtained by Balmer were expressed in 1896 by: |
A.
Bohr
B. Rydberg
C. Planck
D. Rutherford
|
| 10 | X-rays can penetrate in a solid matte through a distance of several: |
A. Kilo metres
B. Metres
C. Centimeters
D. A few angstroms
|
Test Questions
Share your comments & questions here
Salmankhan
01 Feb 2018Some mcqs having wrong answers.