12th class Physics chapter 19 online mcq test with answers for ICS part 2 Physics Chapter 19 (Dawn of Modern Physics)

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

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Ics Part 2 Physics Chapter 19 Test

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ICS Part 1 English Medium Subjects

ICS Part 1 Urdu Medium Subjects

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

Sr. #	Questions	Answers Choice
1	Who explained the photo electric effect.	A. Max Plank B. Einstein C. Henry D. Rutherford
2	If the kinetic energy of a free electron doubles, its de Broglie wavelength changes by the factor.	A. <b style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 16px;">√</b><span style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 16px;">2</span> B. 1/<b style="font-family: arial, sans-serif; font-size: 16px; color: rgb(34, 34, 34);">√</b><span style="font-family: arial, sans-serif; font-size: 16px; color: rgb(34, 34, 34);">2</span> C. 2 D. 1/2
3	In the equation if f<sub>2</sub> > then	A. B. C. D.
4	In an nihilation emitted photons moves in opposite directions to conserve.	A. Mass B. Charge C. Energy D. Momentum
5	Pair production cannto take place in vacuum because :	A. Mass in not conserved B. Momentum is not conserved C. Energy is not conserved D. Charge is not conserved
6	A perfect absorber must also be perfect	A. Cavity B. Sources of radiation C. Radiator D. None of these
7	The energy of photon is givne by	A. mv2/2 B. hf C. Va e D. mac<sup>1</sup>
8	The unit of work function is	A. Electron volt B. Ampere C. Volt cell D. Hz
9	The mass of an object will be doubled at speed.	A. 2.6 x 10<sup>8</sup> m/s B. 1.6 x 10<sup>8 </sup>m/s C. 2.6 x 10<sup>7 </sup>m/s D. 3.6 x 10<sup>7</sup> m/s
10	Joule second is the unit of.	A. Energy B. Wein's constant C. Planck's constant D. Boyle's law

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