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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
Photons must have energy equal to
Question # 2
An compared to solid matter, a crack or an air bubble allows:
Question # 3
The process of formation of spectrum is called:
Question # 4
X-rays produced in a tube operating at 105V. The speed of X-rays produced is
Question # 5
The natural arrangement of colours in the spectrum of white light spectrum is
Question # 6
The results of spectra obtained by Balmer were expressed in 1896 by:
Question # 7
We can excite an atom by
Question # 8
The results of spectra obtained by Blamer were expressed in 1896 by
Question # 9
The lasing or active medium in He-Ne laser discharge tube is:
Question # 10
The minimum wavelength of X-rays produced of 1KV potential difference is applied across the anode and cathode of the tube is
Question # 11
X-rays can penetrate in a solid matte through a distance of several:
Question # 12
The life time of metastable state is equal to
Question # 13
The first series which was identified in the spectrum of hydrogen is called:
Question # 14
An electron of the hydrogen atom in the second orbit is called its:
Question # 15
The transitions of electrons in the hydrogen atom result in the emission of spectral lies in the:
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ECAT Physics Chapter 20 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | 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
|
| 2 | 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
|
| 3 | The results of spectra obtained by Blamer were expressed in 1896 by |
A. Bohr
B. Rydberg
C. Planck
D. Rutherford
|
| 4 | Balmer series was identified in: |
A. 1685
B. 1785
C. 1885
D. 1985
|
| 5 | Braking radiation causes: |
A. Continuous spectrum
B. Line Spectrum
C. Band spectrum
D. Discrete specturm
|
| 6 | 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
|
| 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 | Lyman series in the spectrum of hydrogen exists in the : |
A. Infra-red region
B. Visible region
C. Ultraviolet region
D. Both(A) and (B)
|
| 9 | The results of spectra obtained by Balmer were expressed in 1896 by: |
A.
Bohr
B. Rydberg
C. Planck
D. Rutherford
|
| 10 | 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
|
Test Questions
Share your comments & questions here
Salmankhan
01 Feb 2018Some mcqs having wrong answers.