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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
The minimum wavelength of X-rays produced of 1KV potential difference is applied across the anode and cathode of the tube is
Question # 2
An electron of the hydrogen atom in the second orbit is called its:
Question # 3
Gaussian surface is always:
Question # 4
Laser is a beam of:
Question # 5
The formula of Brackett series can be obtained by putting in the general formula, the value of n equal to:
Question # 6
An compared to solid matter, a crack or an air bubble allows:
Question # 7
The range of wavelengths of colurs in the visible colours is
Question # 8
Tick the series which lie/s in. the infra-red region.
Question # 9
If the distance between two charges is doubled,the force between them will become:
Question # 10
Spectrum represents the number of component colours present in certain light in terms of:
Question # 11
The first shell near the neucles is
Question # 12
The shell closer to the nucleus is called:
Question # 13
The life time of metastable state is equal to
Question # 14
In flesh, light element like carbon, hydrogen and oxygen predominate. Three elements allows ______ amount of incident X-ray to pass through them
Question # 15
X-ray are also known as
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ECAT Physics Chapter 20 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | 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
|
| 2 | 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
|
| 3 | An compared to solid matter, a crack or an air bubble allows: |
A. Great amount of X-rays to pass
B. Smallast amount of X-rays to pass
C. Very samall amount of X-rays to pass
D. Any of these
|
| 4 | The shell closer to the nucleus is called: |
A. N shell
B.
L shell
C. K shell
D. M shell
|
| 5 | Energy required by an electron revolving in certain orbit to jump to an excited state is called: |
A. Ionization energy
B. Ionization potential
C. Excitation energy
D. Excitation potential
|
| 6 | The results of spectra obtained by Balmer were expressed in 1896 by: |
A.
Bohr
B. Rydberg
C. Planck
D. Rutherford
|
| 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 | Laser is a beam of: |
A. Visible light
B. Infra red light
C. Ultra violet light
D. Violet light only
|
| 9 | Ultraviolet region lies in ______ series |
A. Layman
B. Balmer
C. P fund
D. B racket
|
| 10 | The value of the metastable state for Neon is |
A. 20.66eV
B. 20.61eV
C. 19.23eV
D. 18.70eV
|
Test Questions
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