Physics FSC Part 2 Chapter 19 Online MCQ's Test With Answers

Physics FSC Part 2 Chapter 19 Online MCQ's Test

Sr. # Questions Answers Choice
1 The minimum energy required for occurrence of pair production is: 1.022eV 1.02keV 1.02Me.V 1.04MeV
2 When a very high energy modeules such as y radiation interact with matter, the phenomenon arising will be. Photoelectric effect Compton effect Pair production Annihilation of matter
3 Albert Einstein got noble prize in: 1926 1921 1918 1931
4 Albert Einstein got noble prize for service in: Pair production Annihilation of matter theory Compton effect Photoelectric effect
5 Minimum energy needed to escape an electron  ofrm metal surface is called: Threshold energy Threshold frequency Work function Work ability
6 The minimum frequency needed to emit an electron form metal surface is called: Work function Threshold frequency Quanta frequency All of above
7 The emission of electrons from metal surface when exposed to light is called: Compton effect Pair production Photoelectric effect None of above
8 The unit for Plank's constant is: Js<sup>-1</sup> Jm Js&nbsp; Jm<sup>2</sup>
9 Max planck received noble prize in: 1927 1932 1918 1914
10 The value of Stefan is constant is: 4.57 x 10<sup>-8</sup> m<sup>2</sup>k<sup>2</sup> 5.67 x10<sup>-8</sup> wm<sup>-2</sup>k<sup>-4</sup> 6.67x 10<sup>-11</sup> wm<sup>2</sup>k<sup>4</sup> 7.45 x &nbsp;10<sup>-9</sup> m<sup>2</sup> wk<sup>3</sup>
11 The value of Wien's constant: 2.9x10<sup>-3</sup>mk 2.19x10<sup>-7</sup>mk 3.18 x10<sup>6</sup> km<sup>-1</sup> 6.21 x 10<sup>-9</sup>m<sup>2</sup>wk<sup>3</sup>
12 A block body is an ideal: Absorber Radiator Both a &amp; b None of above
13 When platinum is heated is become dull red at: 900°C 500°C 800°C 1100°C
14 Compton shift is maximum for scattering angle of photon 0<sup>o</sup> 90<sup>o</sup> 180<sup>o</sup> 45<sup>o</sup>
15 Unit of Stephen's constant is W m K<sup>-2</sup> W m<sup>-2</sup> K<sup>-4</sup> W m K<sup>-4</sup> None
16 The numerical value of Compton wavelength is equal to 3.43 x 10<sup>-12</sup> m 1.43 x 10<sup>-12</sup>m 2.43 x 10<sup>-12</sup>m 0.43 x 10<sup>-12</sup>m
17 The Compton effect is associated with X-rays y-rays Positive rays ß-rays
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