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19th Chapter

12th Class Physics Chapter 19 Test

Here you can prepare 12th Class Physics Chapter 19 Dawn of Modern Physics Test. Click the button for 100% free full practice test.

2nd Year Physics Chapter 19 Online MCQ Test for 12th Class Physics Chapter 19 (Dawn of Modern Physics)

This online test contains MCQs about following topics:

- Relative Motion
- Frames of Reference
- Special Theory of Relativity
- Black Body Radiation
- Interaction of Electromagnetic Radiation With Matter
- Annihilation of Matter
- Wave Nature of Particles
- Uncertainty Principle

Ics Part 2 Physics Chapter 19 Test
ic

2nd Year Physics Chapter 19 Online MCQ Test for 12th Class Physics Chapter 19 (Dawn of Modern Physics)

Sr. # Questions Answers Choice
1 The energy of photon is givne by
  • A. mv2/2
  • B. hf
  • C. Va e
  • D. mac<sup>1</sup>
2 Pair production can take place only when energy of radiation is equal and greater than 1.02 MeV, thus correct option is.
  • A. X rays
  • B. Gama rays
  • C. Heat Radiation
  • D. Ultraviolet rays
3 In the equation if f<sub>2</sub> &gt; then
  • A.
  • B.
  • C.
  • D.
4 The materialization of energy take place in the process of.
  • A. Photo electric effect
  • B. Compton Effect
  • C. Pair production
  • D. Annihilationof matter
5 The unit for Plank's constant is:
  • A. Js<sup>-1</sup>
  • B. Jm
  • C. Js&nbsp;
  • D. Jm<sup>2</sup>
6 The wavelength associated with the protons moving at speed of 40 m/s is.
  • A. 7.20 nm
  • B. 9.02
  • C. 15.7 nm
  • D. 17.3 nm
7 Who explained the photo electric effect.
  • A. Max Plank
  • B. Einstein
  • C. Henry
  • D. Rutherford
8 The numerical value of Compton wavelength is equal to
  • A. 3.43 x 10<sup>-12</sup> m
  • B. 1.43 x 10<sup>-12</sup>m
  • C. 2.43 x 10<sup>-12</sup>m
  • D. 0.43 x 10<sup>-12</sup>m
9 The quantity/factor h/m<sub>o</sub>c has the dimensions of.
  • A. Length
  • B. Time
  • C. Mass
  • D. Energy
10 Unit of Stephen's constant is
  • A. W m K<sup>-2</sup>
  • B. W m<sup>-2</sup> K<sup>-4</sup>
  • C. W m K<sup>-4</sup>
  • D. None

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