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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 energy of a photon in a beam of infrared radiation of wavelength 1240 nm is
Question # 2
There is no way to detect:
Question # 3
The special theory of relatively treats the problems involving:
Question # 4
The energy of photon 'E' is proported to
Question # 5
Due to relative motion of observer and the frame of reference of events, time always:
Question # 6
The photon of radio-waves has energy of about
Question # 7
Compton shift refers to:
Question # 8
Pair production is the phenomenon in which
Question # 9
According to Einstein, with the great increase in the speed of the body the relativistic length of the body
Question # 10
The mass 'm' of a body moving at 0.8 c (whose rest mass is mo) becomes
Question # 11
the dilation of time applies to the timing processes which are:
Question # 12
If a material object moves with the speed of light 'C' its mass becomes
Question # 13
Albert Einstein got the Nobel prize in physics for his explanation of photoelectric effect in
Question # 14
According to the Max plank, energy is redialed or absorbed in
Question # 15
Converse of pair production is known as
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 | 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
|
| 2 | When a platinum wire is heated, it appears dull red at about |
A. 500°C
B. 900°C
C. 1100°C
D. 1300°C
|
| 3 | Albert Einstein got the Nobel prize in physics for his explanation of photoelectric effect in |
A. 1916
B. 1919
C. 1921
D. 1923
|
| 4 | de-Broglies hypthesis was experimentally verified by |
A. Maxwell
B. Compton
C. Einstein
D. Davison and Germer
|
| 5 | The general theory of relativity treats problems involving |
A. inertial frame of references
B. accelerating frame of references
C. both of these
D. none of these
|
| 6 | There is certain frequency below which no electrons are emitted from the metal surface, this frequency is known as |
A. maximum frequency
B. minimum frequency
C. threshold frequency
D. all of these
|
| 7 | Max Planck received the Nobel Prize for his discovery of energy quants in: |
A. 1718 AD
B. 1918 AH
C. 1818 AD
D. 1918 AD
|
| 8 | Position and momentum of a particle cannot both be measured simultaneously with perfect accuracy. This is the statement of |
A. photoelectric effect
B. pair production
C. Compton effect
D. uncertainty principle
|
| 9 | 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
|
| 10 | An intertial frame of reference is a frame of reference which is |
A. at rest
B. moving with uniform velocity
C. either at rest or moving with uniform velocity
D. none of these
|
Test Questions
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hasnain
30 May 2018no