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MCQ's Test For ECAT Physics Chapter 20 Atomic Spectra
Try The MCQ's Test For ECAT Physics Chapter 20 Atomic Spectra
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Total Questions15
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Time Allowed20
ECAT Physics Chapter 20 Atomic Spectra
00:00
Question # 1
Tick the series which lie/s in. the infra-red region.
Question # 2
X-rays can penetrate in a solid matte through a distance of several:
Question # 3
In case of braking radiations, when the rate of deceleration is very large, the emitted radiation corresponds to:
Question # 4
Lyman series in the spectrum of hydrogen exists in the :
Question # 5
In helium Neon Laser Neon = 15% and Helium = 85% used. The lasing gas this unit is
Question # 6
The life time of metastable state is equal to
Question # 7
The first series which was identified in the spectrum of hydrogen is called:
Question # 8
The inkjet printer eject a thin stream of:
Question # 9
Balmer series lies in that region of electromagnetic wave spectrum which is called:
Question # 10
X-rays produced in a tube operating at 105V. The speed of X-rays produced is
Question # 11
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 # 12
The holes created in the L and M shells are occupied by transitions of:
Question # 13
The photocopying process is called:
Question # 14
Tick the series which lies in the visible region:
Question # 15
If the distance between two charges is doubled,the force between them will become:
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ECAT Physics Chapter 20 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | The He-Ne laser discharge tube is filled with: |
A. 85% He
B. 15% He
C. 50% He
D. 60% He
|
| 2 | The process of formation of spectrum is called: |
A. Interference
B. Spectroscopy
C. Dispersion
D. Reflection
|
| 3 | 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
|
| 4 | The transitions of electrons in the hydrogen atom result in the emission of spectral lies in the: |
A. Ultra red region
B. Visible region
C. Ultraviolet region
D. Any of these
|
| 5 | By CAT scans, we can detect the density difference of the order of: |
A. 1%
B. 20%
C. 30%
D. 50%
|
| 6 | Tick the series which lies in the visible region: |
A. Lyman series
B. Balmer series
C. Paschen series
D. Brackett series
|
| 7 | 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
|
| 8 | The results of spectra obtained by Balmer were expressed in 1896 by: |
A.
Bohr
B. Rydberg
C. Planck
D. Rutherford
|
| 9 | 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
|
| 10 | The first shell near the neucles is |
A. L-shell
B. X-shell
C. N-shell
D. M-shell
|
Test Questions
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