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 In Compton effect the photon behaves as a. Wave Particle Nucleon Both a and b
2 In Compton scatting, the value of shift is equal to Compton's wavelength, when X-rays is scattered at the angle of. 90<sup>o</sup>C Zero 120<sup>o</sup>C 45<sup>o</sup>C
3 Maximum Compton shift is observed at. 30<sup>o</sup>C 90<sup>o</sup>C 45<sup>o</sup>C 180<sup>o</sup>C
4 The quantity/factor h/moc has the dimensions of. Length Time Mass Energy
5 Compton effect proves. Wave nature of radiation Wave nature of particle Dual nature of particle Particle nature of radiations
6 Photo electrons are emitted y using visible light when the metal is. sodium Copper Nicked Cobalt
7 Pair production can take place only when energy of radiation is equal and greater than 1.02 MeV, thus correct option is. X rays Gama rays Heat Radiation Ultraviolet rays
8 Light of 4.5 eV is incident on a Cesium surface and stopping potential is 0.25 eV, maximum K.E. of emitted electron is. 4.5 eV 4.25 eV 4.75 eV 0.25 eV
9 The energy of the photon of wavelength 500 nm is. 3.10 eV 2.49 eV 1.77 eV 1.52 eV
10 The stopping potential for a certain metal is 10 volts. Thus work function for the cathode is. 10 J 1.6 X 10<sup>-18</sup> J 1.6 X 10<sup>-19</sup> J 1.6 X 10<sup>30</sup> J
11 Number of electros emitted in photo electric effect depend upon. Intensity of incident light Frequency of incident light Energy of incident light Wavelength of incident of light
12 Einstein was awarded Nobel prize in physics in 1905 1911 1918 1921
13 Potassium Cathodes in photocell emit electrons for a light. Visible Infra red Ultra violet X rays
14 The number of electrons emitted depends upon Colour of target surface Shape of surface Frequency of incident light Intensity of incident light
15 When the K.E. of photoelectric is zero, the frequency of incident photon is. Less than greater than Equal to Much greater
16 The energy of photon is givne by mv2/2 hf Va e mac<sup>1</sup>
17 Who explained the photo electric effect. Max Plank Einstein Henry Rutherford
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