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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 unit of work function is:
Question # 2
Absolute motion cannot be detected
Question # 3
A bar 1.0 m in length and located along x-axix moves with a speed of 0.75 c with respect to a stationary observer. The length of the bar as measured by the stationary observer is
Question # 4
A photon is considered to have
Question # 5
The idea of quantization of energy was proposed by:
Question # 6
The concept of direction and position are purely
Question # 7
According to the special theory of relativity, a moving clock
Question # 8
According to the electromagnetic wave theory of light, increasing the intensity of incident light should increase the
Question # 9
There is certain frequency below which no electrons are emitted from the metal surface, this frequency is known as
Question # 10
Position was discovered by Carl Anderson in
Question # 11
The ratio of energy E to the corresponding frequency (f) of the radiation (emitted or absorbed) is called:
Question # 12
According to the de-Brogile relation, an object of large mass and ordinary speed has
Question # 13
In process of annihilation of matter, the two photons produced move in opposite direction to converse
Question # 14
The way through which electromagnetic radiations or photons interact with matter depends upon their:
Question # 15
According to the Max plank, energy is redialed or absorbed in
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ECAT Physics Chapter 19 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | According to the Max plank, energy is redialed or absorbed in |
A. discrete packets
B. continuous waves
C. either of them
D. none of these
|
| 2 | According to Einstein, with the great increase in the speed of the body, the relativistic mass of the body |
A. Remains constant
B. Decreases
C. Increases to infinity
D. Reduced to zero
|
| 3 | 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
|
| 4 | Albert Einstein got the Nobel prize in physics for his explanation of photoelectric effect in |
A. 1916
B. 1919
C. 1921
D. 1923
|
| 5 | In process of annihilation of matter, the two photons produced move in opposite direction to converse |
A. momentum
B. charge
C. energy
D. mass
|
| 6 | The value of the plank's constant 'h' is given by |
A. 1.6 x 10-19J
B. 1.67 x 10-27Kg
C. 6.63 x 1034Js
D. 6.63 x 10-34Js
|
| 7 | the dilation of time applies to the timing processes which are: |
A. Physical
B. Chemical
C. Biological
D. All of these
|
| 8 | The existence of position was predicted by Dirace in |
A. 1920
B. 1925
C. 1930
D. 1928
|
| 9 | Davision and Germer performed experiment to verify |
A. de-Brogile hypothesis
B. theory of relativity
C. Newton's law of gravitation
D. Mass-energy relation
|
| 10 | The whole shape of the black body spectrum for all wavelengths was explained by the formula proposed by |
A. Max plank
B. Newton
C. Einstein
D. J.J. Thomson
|
Test Questions