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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 transitions of electrons in the hydrogen atom result in the emission of spectral lies in the:
Question # 2
The process of formation of spectrum is called:
Question # 3
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 # 4
The results of spectra obtained by Balmer were expressed in 1896 by:
Question # 5
CT scanning is the abbreviated name of
Question # 6
X-rays can penetrate in a solid matte through a distance of several:
Question # 7
Gaussian surface is always:
Question # 8
The He-Ne laser discharge tube is filled with:
Question # 9
The lasing or active medium in He-Ne laser discharge tube is:
Question # 10
We can excite an atom by
Question # 11
By CAT scans, we can detect the density difference of the order of:
Question # 12
The natural arrangement of colours in the spectrum of white light spectrum is
Question # 13
Energy required by an electron revolving in certain orbit to jump to an excited state is called:
Question # 14
In helium Neon Laser Neon = 15% and Helium = 85% used. The lasing gas this unit is
Question # 15
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
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ECAT Physics Chapter 20 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | X-rays can penetrate in a solid matte through a distance of several: |
A. Kilo metres
B. Metres
C. Centimeters
D. A few angstroms
|
| 2 | The results of spectra obtained by Balmer were expressed in 1896 by: |
A.
Bohr
B. Rydberg
C. Planck
D. Rutherford
|
| 3 | The value of the metastable state for Neon is |
A. 20.66eV
B. 20.61eV
C. 19.23eV
D. 18.70eV
|
| 4 | Coulomb multiplied by volt by volt gives the unit called: |
A. farad
B. Ohm
C. Second
D. joule
|
| 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 | 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
|
| 7 | We can excite an atom by |
A. Bombardment of particles
B. Radiating photons
C. Providing potential difference
D. All answer are true
|
| 8 | Photons must have energy equal to |
A. ev
B. En
C. hf
D. None of these
|
| 9 | The natural arrangement of colours in the spectrum of white light spectrum is |
A. VIBGYOR
B. ROYBGIV
C. ROYBIGV
D. BIGROYV
|
| 10 | The spectrum emitted from hydrogen filled discharge tube is: |
A. Line spectrum
B. Discrete spectrum
C. And spectrum
D. Absorption spectrum
|
Test Questions