Physics ICS Part 2 Online MCQ's Test With Answers

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Physics ICS Part 2 Online MCQ's Test

Sr. # Questions Answers Choice
1 Two oppositely charged balls A and B attract the third ball C, when placed near them turn by turn The third ball C must be. Positively charged Negatively charged Electrically neutral Positively and negatively charged
2 the force between two charge is 28 N. If paraffin wax of relative permittivity 2.8 is introduced between the charges as medium, then the force reduces to. 25 N 20 N 10 N 15 N
3 If both the magnitude of charges and distance between them is doubled, then coulomb's force will be. Doubled Hlaf Remain same One fourth
4 If the distance between the two charged bodies is halved, the force between them becomes. Double Half Four times One times
5 The electrostatic force between two charges is 42 N, If we place a dielectric of Ey=2.1 between the charges then the force become equal to. 42 N 88.2 N 20 N 2 N
6 The SI unit of relative permittivity is. Fm-1 C2N-1m-2 Nm2C-2 No unit
7 The electrons in one coulomb change is equal to. 1.6 x 10<sup>-19</sup> 2.25 x 10<sup>-19</sup> 6.25 x 10<sup>-18</sup> 6.25 x 10<sup>-19</sup>
8 For which material medium, force between two charged particles is maximum. Ammonia Germanium Mica Teflon
9 If the medium between the charges is not free space then electrostatic force will.be Increase Decrease Remain same None of these
10 Bottom quark carries charge : 2/3 e -2/3 e +1/3 e -1 /3 e
11 Which of the following basic force is able to provide an attraction between two neutrons: Electrostatic and nuclear b Electrostatic and gravitational Gravitational and strong nuclear Only nuclear force
12 Unit of decay constantλ is: ms m<sup>-1</sup> m S<sup>-1</sup>
13 Unit of decay constantλ is: ms m<sup>-1</sup> m S<sup>-1</sup>
14 Gamma radiations are emitted due to: De-excitation of atom De-excitation of nucleus Excitation of atom Excitation of nucleus
15 A radio active substance has a half life of four months. 3 -fourth of the substance will decay in: 6 months 8 months 12 months 16 months
16 The radio active nuclide 86Ra228 decays by a series of emissions of three alpha particles and one beta particle. The nuclide X finally formed is: <sub>64</sub>X<sup>220</sup> <sub>86</sub>X<sup>222</sup> <sub>84</sub>X<sup>216</sup> <sub>88</sub>X<sup>215</sup>
17 The energy equivalent of 1 kg of matter is about: 10<sup>-15</sup> J 1 J 10<sup>-12</sup>J 10<sup>-17</sup>J
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