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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 special theory of relativity is based on:
Question # 2
There is certain frequency below which no electrons are emitted from the metal surface, this frequency is known as
Question # 3
If A represents linear momentum and c, the velocity of light, then unit of pc in international system of units is:
Question # 4
Electromagnetic radiation or photons interact with matter in
Question # 5
When the atomic particle are moving with velocities approaching that of light:
Question # 6
The concept of direction and position are purely
Question # 7
Max plank founded a mathematical model resulting in an equation that describes the shape of observed black body radiation curves exactly, in
Question # 8
When low energy photon interact with a metal,which of the following effect is likely to be taken place
Question # 9
The unit of work function is:
Question # 10
Photoelectric effect takes place with a photon of:
Question # 11
Max Planck received the Nobel Prize for his discovery of energy quants in:
Question # 12
The Stephen-Boltzmann law for the black body radiation is given by
Question # 13
Position was discovered by Carl Anderson in
Question # 14
A particle having mass and charge equal to that of an electron is called:
Question # 15
the symbol to be used in relativity problems denotes:
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 | According to the special theory of relativity, time is |
A. absolute quantity
B. not absolute quantity
C. constant quantity
D. none of these
|
| 2 | The way through which electromagnetic radiations or photons interact with matter depends upon their: |
A. Wavelength
B. Frequency
C. Energy
D. Temperature
|
| 3 | 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
|
| 4 | The speed of a pendulum is measured to be 3.0 s in the inertial reference frame of the pendulum. What is its period measured by an observer moving at a speed of 0.95 c with respect to the pendulum |
A. 2.9 s
B. 3.0 s
C. 6.6 s
D. 9.6 s
|
| 5 | Which of the following is not an example of intertial frame |
A. a body placed on the surface of earth
B. a body placed in a car moving with uniform velocity
C. a body placed in a car moving with same acceleration
D. none of these
|
| 6 | The concept of direction and position are purely |
A. absolute
B. relative
C. absolute or relative
D. none of these
|
| 7 | 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
|
| 8 | 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
|
| 9 | 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
|
| 10 | The special theory of relativity is based on the |
A. one postulate
B. two postulates
C. three postulates
D. four postulates
|
Test Questions
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hasnain
30 May 2018no