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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
X-ray are also known as
Question # 2
The range of wavelengths of colurs in the visible colours is
Question # 3
A metastable stae:
Question # 4
The electric field lines start from:
Question # 5
Spectrum represents the number of component colours present in certain light in terms of:
Question # 6
In helium Neon Laser Neon = 15% and Helium = 85% used. The lasing gas this unit is
Question # 7
Tick the series which lies in the visible region:
Question # 8
Photons must have energy equal to
Question # 9
X-rays produced in a tube operating at 105V. The speed of X-rays produced is
Question # 10
An compared to solid matter, a crack or an air bubble allows:
Question # 11
Gaussian surface is always:
Question # 12
Braking radiation causes:
Question # 13
An electron of the hydrogen atom in the second orbit is called its:
Question # 14
The shell closer to the nucleus is called:
Question # 15
CT scanning is the abbreviated name of
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ECAT Physics Chapter 20 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | Tick the series which lies in the visible region: |
A. Lyman series
B. Balmer series
C. Paschen series
D. Brackett series
|
| 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 | The lasing or active medium in He-Ne laser discharge tube is: |
A. Nitrogen
B. Helium
C. Hydrogen
D. Neon
|
| 4 | Braking radiation causes: |
A. Continuous spectrum
B. Line Spectrum
C. Band spectrum
D. Discrete specturm
|
| 5 | 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
|
| 6 | 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
|
| 7 | The first series which was identified in the spectrum of hydrogen is called: |
A. Lyman series
B. Balmer series
C. Paschen series
D. Brackett series
|
| 8 | Spectrum represents the number of component colours present in certain light in terms of: |
A. Wavelength
B. Frequency
C. Energy
D. Both (A) and (B)
|
| 9 | The electric field lines start from: |
A. Positive charge
B. Negative charge
C. Either A and B
D. Neutron
|
| 10 | The value of the metastable state for Neon is |
A. 20.66eV
B. 20.61eV
C. 19.23eV
D. 18.70eV
|
Test Questions
Share your comments & questions here
Salmankhan
01 Feb 2018Some mcqs having wrong answers.