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 1905, the special theory of relativity was proposed by Einstein Bohr Maxwell De Broglie
2 Internal frame is a frame is which 1st law holds 2nd law holds 3rd law holds Kelvin's law holds
3 All motions are Absolute Uniform Relative Variable
4 Using relativistic effects the location of an air craft after an hour fight can be predicated about 20 m 50 m 760 m 780 m
5 An electron miroscope emplys which to one of the following particles? Electron ahve a wave nature Electrons can be focused by an electric field Electrons can be focused by a magnetic field All of the above
6 We can never accurately describes all aspects of sbatomic particles simulatanously. It is correct according to: Uncertainity Priciple De-broglie Theory Einstin Theory Photo electric effect
7 The position has charge which is in magnitude equal to the charge on Electron Proton <span style="font-weight: bold; color: rgb(106, 106, 106); font-family: arial, sans-serif; font-size: small;">β particle</span> All
8 Pair production cannto take place in vacuum because : Mass in not conserved Momentum is not conserved Energy is not conserved Charge is not conserved
9 Pair production occurs only when energy of photon is at least equal in: 1.02keV 1.02 eV 1.02 MeV 1.02 GeV
10 A perfect absorber must also be perfect Cavity Sources of radiation Radiator None of these
11 De-Broglie waves are associated with Moving charged particles only Moving neutral particles only All moving particles All parties whether in motion or at rest
12 Eintein's Photoelectric equation is Ek= hf -∅ in this equation E1, refers to: K.E of al the emited electrons Mean K.E of emited electrons Maximum K.E of emited electrons Minimum K.E of emited electrons
13 If the kinetic energy of a free electron doubles, its de Broglie wavelength changes by the factor. <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> 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> 2 1/2
14 Wave nature of particle was given by: Clemensen Louis de Broglie Laster H. Germer Clinton S. Davisson
15 The most refined form of matter is: Smoke Light Ice Fog
16 The existence of positron was discovered in: 1929 1928 1931 1933
17 The converses of annihilation of matter is: Photoelectric effect Relativistic effect Pair production Compton effect
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