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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
00:00
Question # 1
The value of the plank's constant 'h' is given by
Question # 2
Victor de-Brogile received the Nobel prize in physics in
Question # 3
Max plank received the Nobel Prize in physics for his discovery of energy quanta in
Question # 4
Practically the quantity v/c is always:
Question # 5
According to the electromagnetic wave theory of light, increasing the intensity of incident light should increase the
Question # 6
The way through which electromagnetic radiations or photons interact with matter depends upon their:
Question # 7
When monochromatic light is allowed to fall on cathode, it begins to emit electrons, these electrons are called
Question # 8
When a platinum wire is heated, it appears white at
Question # 9
Albert Einstein got the Nobel prize in physics for his explanation of photoelectric effect in
Question # 10
The location and speed anywhere on earth can now be determined using relativistic effects by NAVISTAR to an accuracy of
Question # 11
At the temperature, a body emits radiation which is principally
Question # 12
The inside cavity of the black body is
Question # 13
Davision and Germer performed experiment to verify
Question # 14
Newton's law of motion do not hold in
Question # 15
The energy of the 4th orbit in hydrogen atom is
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ECAT Physics Chapter 19 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | Compton studied the scattering of x-rays by loosely bound electrons from: |
A. NaCl crystal
B. Graphite crystal
C. Zirconia
D. Copper crystal
|
| 2 | The location and speed anywhere on earth can now be determined using relativistic effects by NAVISTAR to an accuracy of |
A. 2 cm/s
B. 20 cm/s
C. 200 cm/s
D. 2000 cm/s
|
| 3 | When platinum wire is heated, it appears cherry red at |
A. 1600°C
B. 900°C
C. 1100°C
D. 1300°C
|
| 4 | The stopping voltage for a certain metal is 100 volts, then the work function for the cathode plate is |
A. 100 J
B. 1.6 x 10-17J
C. 100 eV
D. 1.6 x 10-17eV
|
| 5 | The intensity of emitted energy (with wavelength) radiated from a black body at different temperatures was initially measured by: |
A. Lummer
B. Planck
C. Pringsheim
D. Both (A ) and (B)
|
| 6 | 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
|
| 7 | 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
|
| 8 | 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
|
| 9 | Photocell is a device which converts |
A. chemical energy into electrical energy
B. electrical energy into light energy
C. heat energy into electrical energy
D. light energy into electrical energy
|
| 10 | The Nobel Prize on the explanation of photoelectric effect was awarded to: |
A. Max. Planck
B. Maxwell
C. Bohr
D. Rutherford
|
Test Questions
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hasnain
30 May 2018no