ECAT Pre Computer Science Chapter 12 online mcq test with answers for Physics chapter 12 (Electrostatics)

ECAT Physics Chapter 12 Electrostatics Online Test

Sr. #	Questions	Answers Choice
1	The electric field will be uniform	Near a positive point charge Near a negative point charge Between two oppositely charged parallel metal plates None of above
2	Which one of the following has larger value of relative permitivity E_rat room temperature?	Vaccum Air Glass Water
3	If electric and gravitational force on an electron in a uniform electric field will be	E=mg/q E=q/mg E=,g/q E=qg/m
4	Coulomb force, when any material medium is placed between two charges	Increases Decreases Remain unchanged None of these
5	The minimum charge on any object can not be less than	1.6 x 10<sup>-19</sup>C 3.2 x 10<sup>-19</sup>C 1.0 C 4.8 x 10<sup>-19</sup>C
6	The ratio of the gravitational force F_gto the electrostatic force F_ebetween two electrons at the same distance apart is approximately	9.8 24 x 10<sup>19</sup> 24 x 10<sup>42</sup> 24 x 10<sup>-44</sup>
7	The statement "the electric force of repulsion or attraction between two point charges is directly proportional to the product of the charges and inversely proportional to square of the distance between them" refer to	Coulomb's law Gauss's law Biot-Sarwat law Ampere's law
8	The electric field intensity at a point due to a point charge	Falls off inversely as the distance Falls off inversely as the square of distance Remains unchanged with distance Increase directly as square of distance
9	Coulomb's force between two point charges depends upon	Magnitude of charges Distance between them Medium in which they are located All of the above
10	The concept of field theory was put forward by	Franklin Kepler Oersted Michael Faraday
11	The value of electrical constant of proportionality k is	9 x 10<sup>9</sup>Nm<sup>2</sup>C<sup>-2</sup> 9 x 10<sup>-9</sup>Nm<sup>2</sup>C<sup>-2</sup> 9 x 10<sup>10</sup>Nm<sup>2</sup>C<sup>2</sup> 9.85 x 10<sup>-12</sup>N<sup>-1</sup>C<sup>-2</sup>
12	The SI unit of permitivity is	Nm<sup>2</sup>C<sup>2</sup> N<sup>-1</sup>m<sup>-2</sup>C<sup>2</sup> NmC<sup>2</sup> Nm<sup>2</sup>C<sup>-1</sup>
13	If the two charges in Coulomb's law have double distance between them, then electric force	Becomes two-fold Becomes four-fold Remains the same None of these

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