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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
In helium Neon Laser Neon = 15% and Helium = 85% used. The lasing gas this unit is
Question # 2
Selenium is:
Question # 3
An electron of the hydrogen atom in the second orbit is called its:
Question # 4
The results of spectra obtained by Blamer were expressed in 1896 by
Question # 5
Laser is a beam of:
Question # 6
We can excite an atom by
Question # 7
The first shell near the neucles is
Question # 8
The transitions of electrons in the hydrogen atom result in the emission of spectral lies in the:
Question # 9
Static electricity is produced by the transfer of:
Question # 10
If the distance between two charges is doubled,the force between them will become:
Question # 11
The holes created in the L and M shells are occupied by transitions of:
Question # 12
The photocopying process is called:
Question # 13
Spectrum represents the number of component colours present in certain light in terms of:
Question # 14
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 # 15
The value of the metastable state for Neon 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 | Gaussian surface is always: |
A. Rectangular
B. Spherical
C. Cylinder
D. Box shape
|
| 3 | An electron of the hydrogen atom in the second orbit is called its: |
A. Ground state
B. Excited state
C. Ionized state
D. Any of these
|
| 4 | Laser is a beam of: |
A. Visible light
B. Infra red light
C. Ultra violet light
D. Violet light only
|
| 5 | The natural arrangement of colours in the spectrum of white light spectrum is |
A. VIBGYOR
B. ROYBGIV
C. ROYBIGV
D. BIGROYV
|
| 6 | The electric field lines start from: |
A. Positive charge
B. Negative charge
C. Either A and B
D. Neutron
|
| 7 | We can excite an atom by |
A. Bombardment of particles
B. Radiating photons
C. Providing potential difference
D. All answer are true
|
| 8 | Balmer series was identified in: |
A. 1685
B. 1785
C. 1885
D. 1985
|
| 9 | Spectrum represents the number of component colours present in certain light in terms of: |
A. Wavelength
B. Frequency
C. Energy
D. Both (A) and (B)
|
| 10 | Balmer series lies in that region of electromagnetic wave spectrum which is called: |
A. Visible region
B. Invisible region
C. Infra-red region
D. ultraviolet region
|
Test Questions
Share your comments & questions here
Salmankhan
01 Feb 2018Some mcqs having wrong answers.