ECAT Physics Chapter 12 Electrostatics Online Test With Answers

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ECAT Physics Chapter 12 Electrostatics Online Test

Sr. # Questions Answers Choice
1 The current through a metallic conductor is due to the motion of protons neutrons electrons free electrons
2 In RC series circuit the time during which the capacitor acquires 0.63 times the equilibrium charge is called Time constant Decay constant None of these All of above
3 Capacitance of two or more capacitors Increases in series combination Increases in parallel combination Remains unchanged None of the above
4 The electric intensity at infinite distance from the point charge will be Infinite Positive Zero Negative
5 The electric intensity outside the two oppositely charged parallel metal plates is Maximum Minimum Zero Infinite
6 The energy stored in a charge capacitor 1/2CV<sup>2</sup> 1/2C<sup>2</sup>V 1/2C/V<sup>2</sup> None of these
7 In case of a parallel plate capacitor if the plate separation is doubled and plate area is halved, the capacitance becomes Four-fold One-half One-fourth Zero
8 The capacitance of a parallel plate capacitor depends upon Area of the plates Separation between the plates Medium between the plates All of the above
9 Surface density of charge is defined as Charge per unit volume Charge per unit length Charge per unit area Charge per unit mass
10 The SI unit of capacitance is Farad Henry Ohm Volt
11 Electron volt is the unit of. Potential difference Energy Resistance Capacitance
12 The relation between the charge Q of a parallel plate capacitor and the P.D between its plates is Q=V/C Q=C/V Q=1/2CV Q=CV
13 Electron volt is the unit of Potential difference Energy Resistance Capacitance
14 If an electron of charge 'e' is accelerated through a potential difference V., it will acquire energy Ve V/e e/V 2Ve
15 One joule is equal to 1.6 x 10<sup>19</sup>eV 6.25 x 10<sup>18</sup>eV 1.6 x 18<sup>18</sup>eV 6.25 x 10<sup>19</sup>eV
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