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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
The He-Ne laser discharge tube is filled with:
Question # 2
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
Question # 3
Tick the series which lies in the visible region:
Question # 4
The inkjet printer eject a thin stream of:
Question # 5
X-ray are also known as
Question # 6
Lyman series in the spectrum of hydrogen exists in the :
Question # 7
The value of the metastable state for Neon is
Question # 8
By CAT scans, we can detect the density difference of the order of:
Question # 9
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 # 10
Laser is a beam of:
Question # 11
Energy required by an electron revolving in certain orbit to jump to an excited state is called:
Question # 12
The holes created in the L and M shells are occupied by transitions of:
Question # 13
Braking radiation causes:
Question # 14
The process of formation of spectrum is called:
Question # 15
Coulomb multiplied by volt by volt gives the unit called:
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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 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
|
| 3 | Coulomb multiplied by volt by volt gives the unit called: |
A. farad
B. Ohm
C. Second
D. joule
|
| 4 | The minimum wavelength of X-rays produced of 1KV potential difference is applied across the anode and cathode of the tube is |
A. 1.24 x 10-10m
B. 7.92 x 10-20m
C. 2.78 x 10-14m
D. 3.88 x 10-11m
|
| 5 | 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
|
| 6 | The value of the metastable state for Neon is |
A. 20.66eV
B. 20.61eV
C. 19.23eV
D. 18.70eV
|
| 7 | The process of formation of spectrum is called: |
A. Interference
B. Spectroscopy
C. Dispersion
D. Reflection
|
| 8 | 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
|
| 9 | The lasing or active medium in He-Ne laser discharge tube is: |
A. Nitrogen
B. Helium
C. Hydrogen
D. Neon
|
| 10 | Balmer series was identified in: |
A. 1685
B. 1785
C. 1885
D. 1985
|
Test Questions
Share your comments & questions here
Salmankhan
01 Feb 2018Some mcqs having wrong answers.