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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
Laser is a beam of:
Question # 2
Tick the series which lies in the visible region:
Question # 3
The electric field lines start from:
Question # 4
We can excite an atom by
Question # 5
By CAT scans, we can detect the density difference of the order of:
Question # 6
Photons must have energy equal to
Question # 7
The transitions of electrons in the hydrogen atom result in the emission of spectral lies in the:
Question # 8
The lasing or active medium in He-Ne laser discharge tube is:
Question # 9
X-ray are also known as
Question # 10
In flesh, light element like carbon, hydrogen and oxygen predominate. Three elements allows ______ amount of incident X-ray to pass through them
Question # 11
The life time of metastable state is equal to
Question # 12
Static electricity is produced by the transfer of:
Question # 13
The results of spectra obtained by Blamer were expressed in 1896 by
Question # 14
X-rays produced in a tube operating at 105V. The speed of X-rays produced 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 | 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
|
| 2 | 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
|
| 3 | Coulomb multiplied by volt by volt gives the unit called: |
A. farad
B. Ohm
C. Second
D. joule
|
| 4 | X-ray are also known as |
A. Roentgen rays
B. Maxwell rays
C. Plank range
D. Einstein rays
|
| 5 | The process of formation of spectrum is called: |
A. Interference
B. Spectroscopy
C. Dispersion
D. Reflection
|
| 6 | Braking radiation causes: |
A. Continuous spectrum
B. Line Spectrum
C. Band spectrum
D. Discrete specturm
|
| 7 | The electric field lines start from: |
A. Positive charge
B. Negative charge
C. Either A and B
D. Neutron
|
| 8 | 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 |
A. Frequency
B. Penetrating power
C. Energy
D. Method of creation
|
| 9 | 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
|
| 10 | If the distance between two charges is doubled,the force between them will become: |
A. Double
B. Half
C. One third
D. One fourth
|
Test Questions
Share your comments & questions here
Salmankhan
01 Feb 2018Some mcqs having wrong answers.