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MCQ's Test For Physics ECAT Pre Engineering Chapter 19 Dawn of Modern Physics
Try The MCQ's Test For Physics ECAT Pre Engineering Chapter 19 Dawn of Modern Physics
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Total Questions15
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Time Allowed20
Physics ECAT Pre Engineering Chapter 19 Dawn of Modern Physics
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Question # 1
The concept of direction is purely:
Question # 2
The year when A.H. compton was awarded Nobel Prize is:
Question # 3
The location and speed anywhere on earth can now be determined using relativistic effects by NAVISTAR to an accuracy of
Question # 4
A particle of mass 5.0 mg moves with a speed of 8.0 m/s. Its de-Brogile wavelength is
Question # 5
When the atomic particle are moving with velocities approaching that of light:
Question # 6
From the theory of relativity, momentum p of the photon is related to energy as
Question # 7
The way through which electromagnetic radiations or photons interact with matter depends upon their:
Question # 8
Photoelectric effect takes place with a photon of:
Question # 9
According to the electromagnetic wave theory of light, increasing the intensity of incident light should increase the
Question # 10
The Nobel Prize on the explanation of photoelectric effect was awarded to:
Question # 11
Which of the following phenomenon proves the particle nature of light
Question # 12
The emission of electrons from a metal surface when exposed to light of suitable frequency is called the
Question # 13
Davision and Germer performed experiment to verify
Question # 14
The analysis of the distribution of wavelengths of the radiation emitted from a hot body set the foundation of new mechanics, known as
Question # 15
A high temperature, the proportion of shorter wavelengths radiation, emitted by the body
Prepare Complete Set Wise Physics ECAT Pre Engineering Chapter 19 Dawn of Modern Physics MCQs Online With Answers
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ECAT Physics Chapter 19 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | The value of the Stephen's constant for black body radiations is given by |
A. 5.6 x 108Wm-2K-4
B. 5.67 x 10-8Wm-2K-4
C. 2.9 x 10-3mK
D. 2.9 x 103mK
|
| 2 | Max plank founded a mathematical model resulting in an equation that describes the shape of observed black body radiation curves exactly, in |
A. 1890
B. 1895
C. 1900
D. 1905
|
| 3 | With the help of 50 K v electron microscope, a resolution of |
A. 0.5 to 1 m to possible
B. 1 m to 10 m is possible
C. 0.5 to 1 nm is possible
D. 1 to 10 nm is possible
|
| 4 | Which of the following phenomenon proves the particle nature of light |
A. interference
B. diffraction
C. photoelectric effect
D. none of these
|
| 5 | The special theory of relativity is based on the |
A. one postulate
B. two postulates
C. three postulates
D. four postulates
|
| 6 | the symbol to be used in relativity problems denotes: |
A. Dilated time
B. Proper time
C. Life time
D. Half time
|
| 7 | In photoelectric effect the energy of ejected electrons depend on |
A. The frequency
B. The intensity
C. Both frequency and intensity
D. None of these
|
| 8 | In order to produce pair production, a photon must have a energy |
A. 0.511 Me v
B. 0.256 Me v
C. 1.02 Me v
D. 0.956 Me v
|
| 9 | Compton was awarded Nobel prize in physics in |
A. 1921
B. 1923
C. 1925
D. 1927
|
| 10 | Position was discovered by Carl Anderson in |
A. 1920
B. 1925
C. 1928
D. 1932
|
Test Questions
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hasnain
30 May 2018no