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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 ratio of energy E to the corresponding frequency (f) of the radiation (emitted or absorbed) is called:
Question # 2
The emission of electrons from a metal surface when exposed to light of suitable frequency is called the
Question # 3
The Nobel Prize on the explanation of photoelectric effect was awarded to:
Question # 4
Due to relative motion of observer and the frame of reference of events, time always:
Question # 5
The unit of work function is:
Question # 6
An intertial frame of reference is a frame of reference which is
Question # 7
Max plank received the Nobel Prize in physics for his discovery of energy quanta in
Question # 8
A high temperature, the proportion of shorter wavelengths radiation, emitted by the body
Question # 9
Davision and Germer performed experiment to verify
Question # 10
According to the special theory of relativity
Question # 11
Current, voltage, resistance measuring circuit is connected with the galvanometer with the help of switch, known as
Question # 12
Compton was awarded Nobel prize in physics in
Question # 13
Strictly speaking, the earth is:
Question # 14
The special theory of relativity is based on the
Question # 15
The existence of position was predicted by Dirace in
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ECAT Physics Chapter 19 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | According to the special theory of relativity, a moving clock |
A. runs faster
B. runs slower
C. neither runs faster nor slower
D. all of these
|
| 2 | the symbol to be used in relativity problems denotes: |
A. Dilated time
B. Proper time
C. Life time
D. Half time
|
| 3 | Photoelectric effect takes place with a photon of: |
A. Very high energy
B. Very low energy
C. Low energy
D. High energy
|
| 4 | When a high energy photon interact with a metal, which of the following effect is most likely to be taken place |
A. pair production
B. photoelectric effect
C. Compton effect
D. None of these
|
| 5 | The Einstein's changes in length, mass and time are not observed in common life because |
A. We dont observer then seriously
B. The masses are too large
C. Their speed is too small than the speed of right
D. All of the above
|
| 6 | 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 |
A. 1.66 m
B. 1.0 m
C. 0.66 m
D. 2.66 m
|
| 7 | 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
|
| 8 | 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
|
| 9 | A particle of mass 5.0 mg moves with a speed of 8.0 m/s. Its de-Brogile wavelength is |
A. 1.66 m
B. 1.66 x 10-10m
C. 1.66 x 10-29cm
D. 1.66 x 10-29m
|
| 10 | As the light shines on the metal surface, the electrons are ejected |
A. slowly
B. instantaneously
C. either of these
D. none of these
|
Test Questions
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hasnain
30 May 2018no