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 nature of capacity of electrostatic capacitor depends on Shape Size Thickness of plates Area
2 A sheet of aluminium foil of negligible thickness is introduced between the plates of a capacitor. The capacitance of the capacitor Increases Decreases Remain unchanged Becomes infinite
3 The energy required to charge a capacitor of 5μF by connecting D.C. source of 20 KV is 10 KJ 5 KJ 2 KJ 1 KJ
4 When a dielectric material is introduced between the plates of a charged condenser the electric field between the plates Decreases Increases No change May increase or decresase
5 A capacitor of capacity 1μF is charged to 1 KV. The energy stored in J 5 0.5 0.005 50
6 If the distance between the plates of a parallel plate condenser of capacity 10μF is doubled then new capacity will be 5<span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 24px; text-align: center; background-color: rgb(255, 255, 248);"><b>μ</b></span>F 20<span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 24px; text-align: center; background-color: rgb(255, 255, 248);"><b>μ</b></span>F 10<span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 24px; text-align: center; background-color: rgb(255, 255, 248);"><b>μ</b></span>F 15<span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 24px; text-align: center; background-color: rgb(255, 255, 248);"><b>μ</b></span>F
7 The capacity of a parallel plat capacitor depends on the Type to metal used Thickness of plates Potential applied across the plates Separation between the plates
8 In a charged capacitor the energy is stored in Both in positive and negative charges Positive charges The edges of the capacitor plates The electric field between the plates
9 A condenser of capacity 50μF is charged to 10 V.The energy stored is 1.25 x 10<sup>-3</sup>J 3.75 x 10<sup>-3</sup>J 2.5 x 10<sup>-3</sup>J 5 x 10<sup>-3</sup>J
10 A metal plate of thickness half the separation between the capacitor plates of capacitance C is inserted. The new capacitance is C C/2 Zero 2C
11 A one microfarad capacitor of a TV is subjected to 4000 V potential difference. The energy stored in capacitor is 8 J 16 J 4 x 10<sup>-3</sup>J 2 x 10<sup>-3</sup>J
12 A medium of dielectric constant 'K' is introduced between the plates of parallel plate condenser. As a result its capcitance Increase k time Decreases k times Decreases 1/K times Remains unchanged
13 Force acting upon a charged particle kept between the plates of a charged condenser if F. IF one of the plates of the condenser is removed, force acting on the same will become Zero F/2 F 2F
14 A parallel plate capacitor is first charged and then a dielectric slab is introduced between the plates. The quantity that remains unchanged is Charge Q Potential V Capacity Energy U
15 If we increase the distance between two plates of the capacitor, the capacitance will Increase Decrease Remain same First increase then decrease
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