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

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Physics FSC Part 2 Chapter 19 Online MCQ's Test

Sr. # Questions Answers Choice
1 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
2 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
3 Einstein was awarded Nobel prize in physics in 1905 1911 1918 1921
4 By modern system of NAVSTAR, the speed any where on the earth can be determined to accuracy about. 20 ms-1 10 ms-1 2 cms-1 2 ms-1
5 1 kg mass will be equivalent to energy. 9 x 10<sup>8</sup> J 9 X 10<sup>12</sup> J 9 X 10<sup>16</sup> J 9 X 10<sup>19</sup> J
6 The special theory of relativity based on. One postulate Two postulates Three postulates Four postulates
7 The mass of an object will be doubled at speed. 2.6 x 10<sup>8</sup> m/s 1.6 x 10<sup>8 </sup>m/s 2.6 x 10<sup>7 </sup>m/s 3.6 x 10<sup>7</sup> m/s
8 Earth orbital speed is. 10 km/s 20 km/s 30 km/s 40 km/s
9 If an object moves with speed of light, its mass will be. Zero Maximum Minimum infinity
10 In 1905, the special theory of relativity was proposed by Einstein Bohr Maxwell De Broglie
11 Internal frame is a frame is which 1st law holds 2nd law holds 3rd law holds Kelvin's law holds
12 All motions are Absolute Uniform Relative Variable
13 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
14 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
15 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
16 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
17 Pair production cannto take place in vacuum because : Mass in not conserved Momentum is not conserved Energy is not conserved Charge is not conserved
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