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Class 12 Physics (Part I) Chapter 2 Electrostatic Potential And Capacitance Quiz 1 (60 MCQs)

Quiz Instructions

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1. The work done is stored as ..... in the capacitor.
2. The ohmmeter reading for a short circuited capacitor is
3. The capacitance of a parallel-plate capacitor without a dielectric is 0 2FC=$\mu$. If a dielectric with a dielectric constant 3K= is inserted between the plates, calculate the new capacitance of the capacitor.
4. Two capacitors with C$_{A}$ greater than C$_{B}$ and are connected in series with a battery. Which of the following is true?
5. A capacitor has an initial energy stored as U 0. After the dielectric is inserted, the capacitance increases. How does the energy stored in the capacitor change if the potential difference is kept constant?
6. If dielectric is inserted, When the battery is connected the electric filed is
7. The relation between electric field and electric potential is
8. The property of a capacitor to store electricity is called its
9. A charge Q is divided into two parts of q and Q-q. If the coulomb repulsion between them when they are separated is to be maximum, the ratio of Q/q should be-
10. A student generates an equipotential map of a point charge and notices the electric potential decreases the further away from the charge. From only this information the student can determine which of the following?
11. What is the SI unit of resistance?
12. What is the work done per unit charge in bringing a small positive test charge from infinity to a point in an electric field?
13. What is the ability of a system to store an electric charge measured in?
14. Electric potential due to a point charge-q at distance x from it is given by:
15. ..... are the dielectric materials
16. Which of the following capacitors will have least energy stored in it?
17. SI unit of capacitance is
18. If two negative charges are held close together and then released, the charges will
19. How particles are arranged affects ..... energy.
20. What is the measure of a material's ability to reduce the electric field within it?
21. SI unit of permittivity of free space is-
22. What is the SI unit of electric charge?
23. A positive charge $+Q$ $d$ $-Q$
24. The capacitance of 1 $\mu$F equals
25. What is the electrostatic potential at equatorial point of a dipole?
26. Two charges +q and-3q are placed at a distance of 1m apart. The points on the line joining two charges, where electric potential is zero, is:
27. ..... is that property of a capacitor which delays any change of voltage across it
28. Three capacitors each of the capacity C are given. The resultant capacity 2/3 C can be obtained by using them
29. Inserting a dielectric material between two charged parallel conducting plates, originally separated by air and disconnected from a battery, will produce what effect on the capacitor?
30. What is the unit of capacitance?
31. ..... field is associated with the capacitor
32. A charge moves between two equipotential surfaces of 24 V to 15 V. If these surfaces are 2 cm apart, what is the magnitude of the average electric field in-between these surfaces?
33. What is the unit of magnetic flux density?
34. The direction of electric field lines shows the
35. Which of the following capacitors will have the least value of breakdown voltage?
36. A positive charge $Q$ $E$ $d$
37. Electrical potential energy is the energy a charged object has because of its
38. The capacitance between two plates increases with
39. What is the property of a material that determines how much electric field it can withstand before breaking down?
40. If you walk into a region of space and suddenly feel a force, the space is said to contain a
41. As a proton moves in the direction the electric field lines .....
42. These form a surface where the electric potential is constant everywhere on the surface.
43. A small, positively charged object near a positively charged sphere is moved closer to the sphere. The electrical potential energy of the small object
44. Suppose you touch a negatively charged object to a metal sphere so that electrons move from the charged object onto the sphere. After the charged object is moved far away, electrons on the sphere will be
45. If three resistors connected in parallel connection, then effective resistance is ..... $\mu$F, C$_{1}$=5$\mu$F, C$_{2}$=10$\mu$F, C$_{3}$=15$\mu$F
46. The SI unit of electric flux is-
47. The difference in electrical potential energy between two places is called .....
48. The magnitude of electric potential is ..... at an infinite distance.
49. A charge Q is placed at the centre of the line joining two point charges +q and +q. The ratio of charges Q and q is-
50. What is the formula for calculating the total resistance in a series circuit?
51. Capacitors is used to ..... the efficiency of power transmission
52. Electric potential is defined as potential.
53. Total charge stored in the Capacitor is
54. What is the device that stores electric energy in an electric field?
55. The inverse of capacitance is called
56. When a capacitor undergoes a dielectric breakdown
57. In a capacitor the electric charge is stored in
58. If dielectric is inserted, When the battery is connected the capacitance is
59. Two similar spheres having +Q and-Q charges are kept at a certain distance. F force acts between the two. If at the middle of two spheres, another similar sphere having +Q charge is kept, then it experiences a force in magnitude and direction as-
60. The electric potential in a region of space is given by the function V=3x$^{2 }$+ 2y$^{3}$. what is the x-component of the electric field in this area?
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