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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
The transitions of electrons in the hydrogen atom result in the emission of spectral lies in the:
Question # 2
The photocopying process is called:
Question # 3
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 # 4
The first shell near the neucles is
Question # 5
The formula of Brackett series can be obtained by putting in the general formula, the value of n equal to:
Question # 6
The results of spectra obtained by Balmer were expressed in 1896 by:
Question # 7
The inkjet printer eject a thin stream of:
Question # 8
Balmer series lies in that region of electromagnetic wave spectrum which is called:
Question # 9
The He-Ne laser discharge tube is filled with:
Question # 10
X-rays can penetrate in a solid matte through a distance of several:
Question # 11
Laser is a beam of:
Question # 12
An electron of the hydrogen atom in the second orbit is called its:
Question # 13
X-rays produced in a tube operating at 105V. The speed of X-rays produced is
Question # 14
An compared to solid matter, a crack or an air bubble allows:
Question # 15
Selenium is:
Top Scorers Of Physics ECAT Pre Engineering Chapter 20 Atomic Spectra MCQ`s Test
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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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A Abdullah Zubair 11 - Jan - 2025 03 Min 10 Sec 45/60
ECAT Physics Chapter 20 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | The photocopying process is called: |
A. Geography
B. Sonography
C. Xerography
D. Zerography
|
| 2 | By CAT scans, we can detect the density difference of the order of: |
A. 1%
B. 20%
C. 30%
D. 50%
|
| 3 | Tick the series which lie/s in. the infra-red region. |
A. Pfund series
B. Brackett series
C. Paschen series
D. All of these
|
| 4 | 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
|
| 5 | The range of wavelengths of colurs in the visible colours is |
A. 140 nm to 456 nm
B. 10 nm to 56 nm
C. 410 nm to 656 nm
D. 910 nm to 956 nm
|
| 6 | Braking radiation causes: |
A. Continuous spectrum
B. Line Spectrum
C. Band spectrum
D. Discrete specturm
|
| 7 | X-rays can penetrate in a solid matte through a distance of several: |
A. Kilo metres
B. Metres
C. Centimeters
D. A few angstroms
|
| 8 | The spectrum emitted from hydrogen filled discharge tube is: |
A. Line spectrum
B. Discrete spectrum
C. And spectrum
D. Absorption spectrum
|
| 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 |
A. Less than atmospheric pressure
B. Much less than atmospheric pressure
C. Greater than atmospheric pressure
D. Much greater than atmospheric pressure
|
| 10 | 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
|
Test Questions
Share your comments & questions here
Salmankhan
01 Feb 2018Some mcqs having wrong answers.