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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
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Total Questions15
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Time Allowed20
Physics ECAT Pre Engineering Chapter 20 Atomic Spectra
00:00
Question # 1
Gaussian surface is always:
Question # 2
X-ray are also known as
Question # 3
The inkjet printer eject a thin stream of:
Question # 4
In helium Neon Laser Neon = 15% and Helium = 85% used. The lasing gas this unit is
Question # 5
Photons must have energy equal to
Question # 6
The results of spectra obtained by Blamer were expressed in 1896 by
Question # 7
The electric field lines start from:
Question # 8
X-rays can penetrate in a solid matte through a distance of several:
Question # 9
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 # 10
By CAT scans, we can detect the density difference of the order of:
Question # 11
The formula of Brackett series can be obtained by putting in the general formula, the value of n equal to:
Question # 12
Coulomb multiplied by volt by volt gives the unit called:
Question # 13
Lyman series in the spectrum of hydrogen exists in the :
Question # 14
An electron of the hydrogen atom in the second orbit is called its:
Question # 15
The process of formation of spectrum is called:
Top Scorers Of Physics ECAT Pre Engineering Chapter 20 Atomic Spectra MCQ`s Test
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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 -
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M M Umer Arain 24 - Dec - 2024 00 Min 07 Sec 55/60 -
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A Anibullah Anib 07 - Mar - 2024 01 Min 57 Sec 55/60 -
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C Chhabibullah1492 Habib 07 - Mar - 2024 05 Min 43 Sec 55/60 -
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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 | Braking radiation causes: |
A. Continuous spectrum
B. Line Spectrum
C. Band spectrum
D. Discrete specturm
|
| 2 | We can excite an atom by |
A. Bombardment of particles
B. Radiating photons
C. Providing potential difference
D. All answer are true
|
| 3 | The electric field lines start from: |
A. Positive charge
B. Negative charge
C. Either A and B
D. Neutron
|
| 4 | Balmer series was identified in: |
A. 1685
B. 1785
C. 1885
D. 1985
|
| 5 | Ultraviolet region lies in ______ series |
A. Layman
B. Balmer
C. P fund
D. B racket
|
| 6 | The natural arrangement of colours in the spectrum of white light spectrum is |
A. VIBGYOR
B. ROYBGIV
C. ROYBIGV
D. BIGROYV
|
| 7 | Selenium is: |
A. An insulator
B. A conductor
C. Both A and B
D. Excellent conductor
|
| 8 | 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
|
| 9 | X-ray are also known as |
A. Roentgen rays
B. Maxwell rays
C. Plank range
D. Einstein rays
|
| 10 | The process of formation of spectrum is called: |
A. Interference
B. Spectroscopy
C. Dispersion
D. Reflection
|
Test Questions
Share your comments & questions here
Salmankhan
01 Feb 2018Some mcqs having wrong answers.