Electrostatics and Electric Fields - Question Bank
1. A point charge Q is placed at the origin. The electric flux through a closed surface that encloses the origin is independent of:
2. Which of the following is conserved in all electrostatic interactions?
3. The property of a material that opposes the formation of electric field lines within it is called:
4. What is the dielectric constant of vacuum?
5. The work done in moving a unit positive charge from infinity to a point in an electric field is equal to the:
6. If two equal positive charges are brought closer together, the potential energy of the system:
7. What is the electric field at the surface of a conductor in electrostatic equilibrium?
8. The process of removing electrons from an atom or molecule is called:
9. What is the SI unit of electric current?
10. Electric field lines are denser where the electric field is:
11. A Van de Graaff generator produces:
12. The force on a charge q in an electric field E is given by:
13. What is the electrostatic potential energy of a system of two point charges q₁ and q₂ separated by a distance r?
14. The capacitance of a spherical conductor of radius R is:
15. Which statement is true regarding conductors in electrostatic equilibrium?
16. If the electric field is uniform, the work done to move a charge between two points depends on:
17. The unit of electric flux is:
18. What is the electric field at a distance 'r' from the center of a uniformly charged solid sphere of radius R and total charge Q (for r < R)?
19. What is the electric field at a distance 'r' from the center of a uniformly charged spherical shell of radius R and total charge Q (for r > R)?
20. What is the electric field at a distance 'r' from an infinitely long uniformly charged wire with linear charge density λ?
21. Which of the following is a vector quantity?
22. The electrostatic force between two charges is proportional to the inverse square of the distance between them. This is a statement of:
23. The permittivity of free space (ε₀) is approximately:
24. If a dielectric material is inserted between the plates of a parallel plate capacitor, its capacitance:
25. The capacitance of a parallel plate capacitor is given by C = ε₀A/d, where A is the area of the plates and d is the distance between them. If d is doubled, the capacitance:
26. The unit of electric dipole moment is:
27. The electric dipole moment is defined as the product of one charge and the:
28. A dipole consists of two:
29. Electric field lines are always perpendicular to:
30. An equipotential surface is a surface on which the electric potential is:
31. What is the electric potential at the center of an electric dipole?
32. What is the electric field at the center of an electric dipole?
33. A region where a charged particle experiences a force due to the presence of other charges is called an:
34. The relationship between electric field (E) and electric potential (V) is given by:
35. Electric potential is a:
36. The unit of electric potential is:
37. The potential difference between two points is the work done per unit charge to move a charge between those points:
38. In a conductor, under electrostatic conditions, the net charge resides:
39. In a conductor, under electrostatic conditions, the electric field inside the conductor is:
40. For a point charge 'q' at the center of a cube, the electric flux through one face of the cube is:
41. Gauss's Law relates the electric flux through a closed surface to the:
42. What is the electric flux through a closed surface?
43. Electric field lines never intersect because:
44. Electric field lines originate from positive charges and terminate on:
45. The unit of electric field strength is:
46. Electric field strength is defined as the force per unit:
47. The force between a positive and a negative charge is:
48. The force between two positive charges is:
49. Which law states that the force between two point charges is directly proportional to the product of their charges and inversely proportional to the square of the distance between them?
50. What is the fundamental unit of electric charge?