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 maximum kinetic energy of emitted photo electrons depends upon. The intensity of incident light Frequency of the incident light Metal surface Both frequency of incident light and metal surface.
2 The unit of Plank's constant 'h' is. JC J/C JS J/S
3 unit of Plank's constant is same as that of. Acceleration Angular momentum Linear momentum Entropy
4 Joule second is the unit of. Energy Wein's constant Planck's constant Boyle's law
5 The dimensions of Plank's constant is same as that of. Energy Power Acceleration Angular momentum
6 When platinum wire is heated, it changes to cherry red at temperature. 500<sup>o</sup>C 900<sup>o</sup>C 1100<sup>o</sup>C 1300<sup>o</sup>C
7 Energy of Black body radiation depends upon Nature of surface of body Nature of material of body Shape and size of body Temperature of the body
8 Platinum wire becomes white at a temperature of. 1600<sup>o</sup>C 1300<sup>o</sup>C 1100<sup>o</sup>C 900<sup>o</sup>C
9 When platinum is it becomes orange at. 500<sup>o</sup>C 900<sup>o</sup>C 1100<sup>o</sup>C 1300<sup>o</sup>C
10 When platinum is it becomes orange at 500<sup>o</sup>C 900<sup>o</sup>C 1100<sup>o</sup>C 1300<sup>o</sup>C
11 Platinum wire becomes yellow at a temperature of. 900<sup> o</sup>C 1300<sup>o</sup>C 1600<sup>o</sup>C 500<sup>o</sup>C
12 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
13 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
14 The special theory of relativity based on. One postulate Two postulates Three postulates Four postulates
15 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
16 Earth orbital speed is. 10 km/s 20 km/s 30 km/s 40 km/s
17 If an object moves with speed of light, its mass will be. Zero Maximum Minimum infinity
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