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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 electric field lines start from:
Question # 2
The He-Ne laser discharge tube is filled with:
Question # 3
Gaussian surface is always:
Question # 4
Balmer series lies in that region of electromagnetic wave spectrum which is called:
Question # 5
If the distance between two charges is doubled,the force between them will become:
Question # 6
Laser is a beam of:
Question # 7
The value of the metastable state for Neon is
Question # 8
Braking radiation causes:
Question # 9
The shell closer to the nucleus is called:
Question # 10
The process of formation of spectrum is called:
Question # 11
The first series which was identified in the spectrum of hydrogen is called:
Question # 12
The results of spectra obtained by Blamer were expressed in 1896 by
Question # 13
In flesh, light element like carbon, hydrogen and oxygen predominate. Three elements allows ______ amount of incident X-ray to pass through them
Question # 14
Energy required by an electron revolving in certain orbit to jump to an excited state is called:
Question # 15
The transitions of electrons in the hydrogen atom result in the emission of spectral lies in the:
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ECAT Physics Chapter 20 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | X-rays produced in a tube operating at 105V. The speed of X-rays produced is |
A. 3 x 108m/s
B. 3.1 x 108m/s
C. 2.8 x 108m/s
D. 1.88 x 108m/s
|
| 2 | 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
|
| 3 | Coulomb multiplied by volt by volt gives the unit called: |
A. farad
B. Ohm
C. Second
D. joule
|
| 4 | CT scanning is the abbreviated name of |
A. Computed Technology
B. Computed Technique
C. Computed Technology
D. Computerized Technique
|
| 5 | The spectrum emitted from hydrogen filled discharge tube is: |
A. Line spectrum
B. Discrete spectrum
C. And spectrum
D. Absorption spectrum
|
| 6 | 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
|
| 7 | 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
|
| 8 | The results of spectra obtained by Balmer were expressed in 1896 by: |
A.
Bohr
B. Rydberg
C. Planck
D. Rutherford
|
| 9 | Graph of Black body radiation is example of |
A. Band spectra
B. Continuo's spectra
C. Line spectra
D. All
|
| 10 | Selenium is: |
A. An insulator
B. A conductor
C. Both A and B
D. Excellent conductor
|
Test Questions
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