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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
Energy required by an electron revolving in certain orbit to jump to an excited state is called:
Question # 2
Spectrum represents the number of component colours present in certain light in terms of:
Question # 3
The first series which was identified in the spectrum of hydrogen is called:
Question # 4
Ultraviolet region lies in ______ series
Question # 5
By CAT scans, we can detect the density difference of the order of:
Question # 6
In helium Neon Laser Neon = 15% and Helium = 85% used. The lasing gas this unit is
Question # 7
The holes created in the L and M shells are occupied by transitions of:
Question # 8
An compared to solid matter, a crack or an air bubble allows:
Question # 9
We can excite an atom by
Question # 10
The formula of Brackett series can be obtained by putting in the general formula, the value of n equal to:
Question # 11
The lasing or active medium in He-Ne laser discharge tube is:
Question # 12
The value of the metastable state for Neon is
Question # 13
The inkjet printer eject a thin stream of:
Question # 14
X-rays can penetrate in a solid matte through a distance of several:
Question # 15
The process of formation of spectrum is called:
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ECAT Physics Chapter 20 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | 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
|
| 2 | CT scanning is the abbreviated name of |
A. Computed Technology
B. Computed Technique
C. Computed Technology
D. Computerized Technique
|
| 3 | 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
|
| 4 | 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
|
| 5 | The holes created in the L and M shells are occupied by transitions of: |
A. Electrons from lower states
B. Electrons from higher state
C. Positrons from higher states
D. Electrons from K shell
|
| 6 | The He-Ne laser discharge tube is filled with: |
A. 85% He
B. 15% He
C. 50% He
D. 60% He
|
| 7 | Braking radiation causes: |
A. Continuous spectrum
B. Line Spectrum
C. Band spectrum
D. Discrete specturm
|
| 8 | Consider a photon of continuous X-ray and a photon of characteristics X-ray of same wavelength. Which of the following is/are different for the two photons |
A. Frequency
B. Penetrating power
C. Energy
D. Method of creation
|
| 9 | 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
|
| 10 | We can excite an atom by |
A. Bombardment of particles
B. Radiating photons
C. Providing potential difference
D. All answer are true
|
Test Questions
Share your comments & questions here
Salmankhan
01 Feb 2018Some mcqs having wrong answers.