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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
Spectrum represents the number of component colours present in certain light in terms of:
Question # 2
The value of the metastable state for Neon is
Question # 3
Static electricity is produced by the transfer of:
Question # 4
The shell closer to the nucleus is called:
Question # 5
CT scanning is the abbreviated name of
Question # 6
An compared to solid matter, a crack or an air bubble allows:
Question # 7
We can excite an atom by
Question # 8
The range of wavelengths of colurs in the visible colours is
Question # 9
Coulomb multiplied by volt by volt gives the unit called:
Question # 10
Selenium is:
Question # 11
A metastable stae:
Question # 12
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 # 13
The first series which was identified in the spectrum of hydrogen is called:
Question # 14
Lyman series in the spectrum of hydrogen exists in the :
Question # 15
The minimum wavelength of X-rays produced of 1KV potential difference is applied across the anode and cathode of the tube is
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ECAT Physics Chapter 20 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | 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
|
| 2 | The range of wavelengths of colurs in the visible colours is |
A. 140 nm to 456 nm
B. 10 nm to 56 nm
C. 410 nm to 656 nm
D. 910 nm to 956 nm
|
| 3 | 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
|
| 4 | The lasing or active medium in He-Ne laser discharge tube is: |
A. Nitrogen
B. Helium
C. Hydrogen
D. Neon
|
| 5 | We can excite an atom by |
A. Bombardment of particles
B. Radiating photons
C. Providing potential difference
D. All answer are true
|
| 6 | The results of spectra obtained by Balmer were expressed in 1896 by: |
A.
Bohr
B. Rydberg
C. Planck
D. Rutherford
|
| 7 | In helium Neon Laser Neon = 15% and Helium = 85% used. The lasing gas this unit is |
A. Helium
B. Neon
C. Both
D. None of these
|
| 8 | Static electricity is produced by the transfer of: |
A. Electrons
B. Protons
C. One fluid
D. Two fluid
|
| 9 | Tick the series which lies in the visible region: |
A. Lyman series
B. Balmer series
C. Paschen series
D. Brackett series
|
| 10 | Coulomb multiplied by volt by volt gives the unit called: |
A. farad
B. Ohm
C. Second
D. joule
|
Test Questions