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MCQ's Test For ECAT Physics Chapter 19 Dawn of Modern Physics
Try The MCQ's Test For ECAT Physics Chapter 19 Dawn of Modern Physics
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Total Questions15
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Time Allowed20
ECAT Physics Chapter 19 Dawn of Modern Physics
00:00
Question # 1
Compton shift refers to:
Question # 2
The existence of position was predicted by Dirace in
Question # 3
The way through which electromagnetic radiations or photons interact with matter depends upon their:
Question # 4
The ratio of energy E to the corresponding frequency (f) of the radiation (emitted or absorbed) is called:
Question # 5
The concept of direction is purely:
Question # 6
Due to relative motion of observer and the frame of reference of events, time always:
Question # 7
As the light shines on the metal surface, the electrons are ejected
Question # 8
Max Planck received the Nobel Prize for his discovery of energy quants in:
Question # 9
The special theory of relativity is based on the
Question # 10
The energy of the 4th orbit in hydrogen atom is
Question # 11
Electromagnetic radiation or photons interact with matter in
Question # 12
Davision and Germer performed experiment to verify
Question # 13
The Einstein's changes in length, mass and time are not observed in common life because
Question # 14
Which of the following phenomenon proves the particle nature of light
Question # 15
The special theory of relativity treats problems invoving
Prepare Complete Set Wise ECAT Physics Chapter 19 Dawn of Modern Physics MCQs Online With Answers
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H HAMZA Shah 21 - Sep - 2021 00 Min 42 Sec 60/60 -
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ECAT Physics Chapter 19 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | In process of annihilation of matter, the two photons produced move in opposite direction to converse |
A. momentum
B. charge
C. energy
D. mass
|
| 2 | The existence of position was predicted by Dirace in |
A. 1920
B. 1925
C. 1930
D. 1928
|
| 3 | 0.1 kg mass will be equivalent to the energy |
A. 9 x 1015J
B. 5 x 108J
C. 6 x 1016J
D. 9 x 10-16J
|
| 4 | The ratio of energy E to the corresponding frequency (f) of the radiation (emitted or absorbed) is called: |
A. Wien's constant
B. Stefen's constnat
C. Planck's constant
D. Boltzmann's constant
|
| 5 | The analysis of the distribution of wavelengths of the radiation emitted from a hot body set the foundation of new mechanics, known as |
A. classical mechanics
B. Newtonian mechanics
C. quantum mechanics
D. statistical mechanics
|
| 6 | From the theory of relativity, momentum p of the photon is related to energy as |
A. p = hfc
B. p = hf/c
C. p = f(hc,f)
D. p = cf/h
|
| 7 | If you are moving at relativistic speed between two points that are a fixed distance apart, then the distance between the two points appers |
A. larger
B. shorter
C. equal
D. none of these
|
| 8 | Intensity of light determines the: |
A. Energy of each photon
B. Number of photons
C. Speed of photons
D. Size of photons
|
| 9 | An inertial frame is that frame in which |
A. a>0
B. a=0
C. a<0
D. none of these
|
| 10 | The energy of photon 'E' is proported to |
A. The magnetic field H
B. The electric field E
C. Both the electric and magnetic field H and E
D. Frequency
|
Test Questions