Electrostatics and Electric Fields - One Line Questions

1. What is the dielectric constant of vacuum? — 1
2. The capacitance of a spherical conductor of radius R is: — 4πε₀R
3. The permittivity of free space (ε₀) is approximately: — 8.85 x 10⁻¹² C²/Nm²
4. The potential difference between two points is the work done per unit charge to move a charge between those points: — Against the electric field
5. The force between two positive charges is: — Repulsive
6. The force between a positive and a negative charge is: — Attractive
7. Electric field strength is defined as the force per unit: — Charge
8. Electric field lines are always perpendicular to: — Equipotential surfaces
9. The property of a material that opposes the formation of electric field lines within it is called: — Permittivity
10. The unit of electric dipole moment is: — Coulomb-meter
11. If a dielectric material is inserted between the plates of a parallel plate capacitor, its capacitance: — Increases
12. The electric dipole moment is defined as the product of one charge and the: — Distance between the charges
13. 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: — Halves
14. The relationship between electric field (E) and electric potential (V) is given by: — E = -dV/dr
15. Electric field lines never intersect because: — A point cannot have two different electric field directions
16. The work done in moving a unit positive charge from infinity to a point in an electric field is equal to the: — Electric potential at that point
17. A region where a charged particle experiences a force due to the presence of other charges is called an: — Electric field
18. Which of the following is a vector quantity? — Electric field strength
19. Which of the following is conserved in all electrostatic interactions? — Electric charge
20. What is the fundamental unit of electric charge? — Coulomb
21. A dipole consists of two: — Equal and opposite charges separated by a distance
22. The force on a charge q in an electric field E is given by: — F = qE
23. The electrostatic force between two charges is proportional to the inverse square of the distance between them. This is a statement of: — Coulomb's Law
24. A Van de Graaff generator produces: — High voltage, low current
25. If two equal positive charges are brought closer together, the potential energy of the system: — Increases
26. In a conductor, under electrostatic conditions, the net charge resides: — On the surface of the conductor
27. The process of removing electrons from an atom or molecule is called: — Ionization
28. The unit of electric potential is: — Joule/Coulomb
29. 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)? — KQ/r²
30. What is the electrostatic potential energy of a system of two point charges q₁ and q₂ separated by a distance r? — kq₁q₂/r
31. 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)? — KQr/R³
32. In a conductor, under electrostatic conditions, the electric field inside the conductor is: — Zero
33. The unit of electric flux is: — Both A and B
34. 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? — Coulomb's Law
35. The unit of electric field strength is: — Both A and C
36. Electric field lines originate from positive charges and terminate on: — Negative charges
37. For a point charge 'q' at the center of a cube, the electric flux through one face of the cube is: — q / (6ε₀)
38. Electric potential is a: — Scalar quantity
39. Gauss's Law relates the electric flux through a closed surface to the: — Net charge enclosed
40. Which statement is true regarding conductors in electrostatic equilibrium? — The net charge resides on the surface.
41. A point charge Q is placed at the origin. The electric flux through a closed surface that encloses the origin is independent of: — The shape and size of the closed surface
42. What is the electric flux through a closed surface? — The net charge enclosed divided by the permittivity of free space
43. If the electric field is uniform, the work done to move a charge between two points depends on: — The displacement between the points
44. An equipotential surface is a surface on which the electric potential is: — Constant
45. What is the SI unit of electric current? — Ampere
46. Electric field lines are denser where the electric field is: — Stronger
47. What is the electric field at the center of an electric dipole? — Zero
48. What is the electric potential at the center of an electric dipole? — Zero
49. What is the electric field at the surface of a conductor in electrostatic equilibrium? — Perpendicular to the surface
50. What is the electric field at a distance 'r' from an infinitely long uniformly charged wire with linear charge density λ? — λ / (2πε₀r)
All One Line Questions
E-Book Electrostatics and Electric Fields Online Test Electrostatics and Electric Fields Question Bank Electrostatics and Electric Fields