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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
A metastable stae:
Question # 2
The shell closer to the nucleus is called:
Question # 3
The process of formation of spectrum is called:
Question # 4
An electron of the hydrogen atom in the second orbit is called its:
Question # 5
Spectrum represents the number of component colours present in certain light in terms of:
Question # 6
Balmer series lies in that region of electromagnetic wave spectrum which is called:
Question # 7
CT scanning is the abbreviated name of
Question # 8
The minimum wavelength of X-rays produced of 1KV potential difference is applied across the anode and cathode of the tube is
Question # 9
The results of spectra obtained by Balmer were expressed in 1896 by:
Question # 10
The holes created in the L and M shells are occupied by transitions of:
Question # 11
The value of the metastable state for Neon is
Question # 12
Tick the series which lies in the visible region:
Question # 13
X-ray are also known as
Question # 14
In flesh, light element like carbon, hydrogen and oxygen predominate. Three elements allows ______ amount of incident X-ray to pass through them
Question # 15
If the distance between two charges is doubled,the force between them will become:
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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 | 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 | We can excite an atom by |
A. Bombardment of particles
B. Radiating photons
C. Providing potential difference
D. All answer are true
|
| 5 | The lasing or active medium in He-Ne laser discharge tube is: |
A. Nitrogen
B. Helium
C. Hydrogen
D. Neon
|
| 6 | Static electricity is produced by the transfer of: |
A. Electrons
B. Protons
C. One fluid
D. Two fluid
|
| 7 | The He-Ne laser discharge tube is filled with: |
A. 85% He
B. 15% He
C. 50% He
D. 60% He
|
| 8 | The natural arrangement of colours in the spectrum of white light spectrum is |
A. VIBGYOR
B. ROYBGIV
C. ROYBIGV
D. BIGROYV
|
| 9 | X-rays can penetrate in a solid matte through a distance of several: |
A. Kilo metres
B. Metres
C. Centimeters
D. A few angstroms
|
| 10 | 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
|
Test Questions