This quiz works best with JavaScript enabled. Home > Cbse > Class 12 > Science > Physics Part I > Class 12 Physics (Part I) Chapter 1 Electric Charges And Fields – Quiz 2 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Physics (Part I) Chapter 1 Electric Charges And Fields Quiz 2 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Two point charges, initially 2 cm apart, are moved to a distance of 10 cm apart. By what factor does the resulting electric force between them change? A) 25. B) 1/5. C) 1/25. D) 5. Show Answer Correct Answer: C) 1/25. 2. Which has a charge with the greatest magnitude? A) An object with a charge of-2. B) An object with a charge of +2. C) An object with a charge of-3. D) An object with a charge of 0. Show Answer Correct Answer: C) An object with a charge of-3. 3. The value of electric field inside a conducting sphere having radius R and charge Q will be: A) Zero. B) $\frac{kQ}{R^2}$. C) $\frac{kQ^2}{R^2}$. D) $\frac{kQ}{R^{ }}$. Show Answer Correct Answer: A) Zero. 4. What do we call electricity that builds up on an object? A) Current Electricity. B) Static Electricity. C) An electrical field. D) Shmoovin. Show Answer Correct Answer: B) Static Electricity. 5. If q is the charge per unit area on the surface of a conductor, then the electric field intensity at a point on the surface is A) $\frac{q}{2\epsilon_o}$. B) $\frac{q}{2\epsilon_o}$. C) $\frac{q}{\epsilon_o}$. D) $\frac{q}{\epsilon_o}$. Show Answer Correct Answer: C) $\frac{q}{\epsilon_o}$. 6. A charged particle is placed in a uniform electric field. What is the direction of the force acting on the particle if it is positively charged? A) Perpendicular to the electric field. B) No force acts on the particle. C) Opposite to the direction of the electric field. D) In the direction of the electric field. Show Answer Correct Answer: D) In the direction of the electric field. 7. Which of the following statements is not true about Gauss's law? A) Gauss's law is true for any closed surface. B) The term q on the right side side of Gauss's law includes the sum of all charges enclosed by the surface. C) Gauss's law is not much useful in calculating electrostatic field when the system has some symmetry. D) Gauss's law is based on the inverse square dependence on distance contained in the coulomb's law. Show Answer Correct Answer: D) Gauss's law is based on the inverse square dependence on distance contained in the coulomb's law. 8. Where can an electric field be found? A) Below a force field. B) Outside of a magnetic field. C) In the space surrounding a charged object. D) In a gravitational field. Show Answer Correct Answer: C) In the space surrounding a charged object. 9. Coulomb's law also says if distance increases, then force A) Doubles. B) Destroyed in a heartbeat. C) Decreases. D) Disapears. Show Answer Correct Answer: C) Decreases. 10. Uncharged particle found in the nucleus is ..... A) Ion. B) Proton. C) Electron. D) Neutron. Show Answer Correct Answer: D) Neutron. 11. The unit of electric field is not equivalent to A) J/C. B) V/m. C) J/Coulomb.meter. D) N/C. Show Answer Correct Answer: A) J/C. 12. The quantisation of charge indicates that A) Charge, which is a fraction of charge on an electron, is not possible. B) A charge cannot be destroyed. C) Charge exists on particles. D) None of these. Show Answer Correct Answer: A) Charge, which is a fraction of charge on an electron, is not possible. 13. Electrostatics is the study of A) Moving charges. B) Stationary charges. C) All charges. D) None of the above. Show Answer Correct Answer: B) Stationary charges. 14. Particles with like charges ..... A) Are neutral. B) Attract. C) Like to go to parties. D) Repel. Show Answer Correct Answer: D) Repel. 15. 10 electric dipoles each of the dipole moment P are enclosed within a closed surface. Total electric flux linked with the surface is A) 5 Vm. B) 20 Vm. C) 10 Vm. D) Zero. Show Answer Correct Answer: D) Zero. 16. Electric intensity, due to an electric di-pole at any point on the equatorial line is directed: A) In the direction of $\overrightarrow{p}$. B) In the direction perpendicular to $\overrightarrow{p}$. C) In any other direction. D) In the opposite direction of $\overrightarrow{p}$. Show Answer Correct Answer: D) In the opposite direction of $\overrightarrow{p}$. 17. If a positively charged object is brought near a neutral conductor, what happens to the electrons in the conductor? A) They are repelled by the charged object. B) They remain stationary. C) They move towards the charged object. D) They move away from the charged object. Show Answer Correct Answer: C) They move towards the charged object. 18. The electric charges are distributed in a small volume. The flux of the electric field through a surface of radius 10cm surrounding the total charge is 20 Vm.The flux over a concentric sphere of radius 20cm will be A) 40 Vm. B) 20 Vm. C) 25 Vm. D) 200 Vm. Show Answer Correct Answer: B) 20 Vm. 19. Protons have a ..... charge and Electrons have a ..... charge. A) Positive, Positive. B) Negative, Positive. C) Positive, Negative. D) Negative, Negative. Show Answer Correct Answer: C) Positive, Negative. 20. By how much is the electrical force between a pair of ions reduced when their separation distance is doubled (2x)? Tripled (3x)? A) 2 times less ; 3 times less. B) 4 times less ; 9 times less. C) 8 times less ; 27 times less. D) None of the above. Show Answer Correct Answer: B) 4 times less ; 9 times less. 21. Electrostatic force is a ..... force. A) Conservative. B) Dissipative. C) Non conservative. D) Medium independent. Show Answer Correct Answer: A) Conservative. 22. Static electricity is the build up of ..... on an object by adding or removing ..... from it. A) Charge:protons. B) Current:electrons. C) Current:electrons. D) Energy:neutrons. Show Answer Correct Answer: B) Current:electrons. 23. What are the two types of charges that objects may possess? A) + and +. B) + and-. C) + and neutral. D) -and neutral. Show Answer Correct Answer: B) + and-. 24. What is the magnitude of the electric field intensity at a point where a proton experiences an electrostatic force of magnitude 2.30 x 10$^{-25}$ newton? A) 1.44 x 10$^{44}$ N/C. B) 3.68 x 10$^{6}$ N/C. C) 3.68 x 10$^{-44}$ N/C. D) 1.44 x 10$^{-6}$ N/C. Show Answer Correct Answer: D) 1.44 x 10$^{-6}$ N/C. 25. In a cooking competition, what is the unit of measurement used to determine the amount of space a dish occupies? A) Teaspoon. B) Tablespoon. C) Cup. D) Steradian. Show Answer Correct Answer: D) Steradian. 26. When two objects have the same charge, they are (such as + and +) A) Attracted to each other. B) Repelled by each other. C) Have no effect on each other. D) None of the above. Show Answer Correct Answer: B) Repelled by each other. 27. What do we call electricity that moves from one place to another? A) A Magnetic Field. B) Rockin. C) Current Electricity. D) Static Electricity. Show Answer Correct Answer: C) Current Electricity. 28. Net electrostatic field inside a positively charged conductor is ..... A) Always Positive. B) Always Negative. C) Zero. D) Dependent on nature of conductor. Show Answer Correct Answer: C) Zero. 29. In a science fair, the solid angle subtended by a dome at its center is: A) $2\pi^2$. B) $4\pi^2$. C) $2\pi$. D) $4\pi^{ }$. Show Answer Correct Answer: D) $4\pi^{ }$. 30. Gauss law is valid only for the fields which follows inverse square law. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 31. An atom of oxygen has 8 protons and 10 electrons, this means the atom is ..... A) Negatively charged because it has a deficiency of electrons. B) Positively charged because it has a deficiency of electrons. C) Positively charged because it has excess electrons. D) Negatively charged because it has excess electrons. Show Answer Correct Answer: D) Negatively charged because it has excess electrons. 32. The force acting between two point charges kept at a certain distance is $\phi$ A) $\phi$. B) $16\phi$. C) $8\phi$. D) $4\phi$. Show Answer Correct Answer: B) $16\phi$. 33. Electric field produced due to an infinitely long straight uniformly charged wire at perpendicular distance of 2 cm is 3 x 10$^{8}$ N/C. Then linear charge density on the wire is ..... (k = 9 x 10$^{9}$ SI) A) $48.3\\frac{\mu C}{m}$. B) $66.6\\frac{\mu C}{m}$. C) $333\\frac{\mu C}{m}$. D) $33.3\\frac{\mu C}{m}$. Show Answer Correct Answer: C) $333\\frac{\mu C}{m}$. 34. Particles with opposite charges ..... A) Are neutral. B) Do nothing. C) Repel. D) Attract. Show Answer Correct Answer: D) Attract. 35. Electric flux is the total number of electric lines of force passing through the surface A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 36. A hollow metal sphere of 5cm is charged, such that the potential on its surface is 10V. The potential at the centre of the sphere is: A) 10V. B) 0V. C) Same as at a point 5 cm away from the surface. D) Same as at point 25 cm away from the surface. Show Answer Correct Answer: A) 10V. 37. Electric field intensity due to a short dipole remains directly proportional to-(r $\rightarrow$ distance of a point from centre of dipole ):- A) R$^{2}$. B) R$^{3}$. C) R$^{-2}$. D) R$^{-3}$. Show Answer Correct Answer: D) R$^{-3}$. 38. If Charge Q is kept in a sphere of 5 cm first than it is kept in a cube of side 5 cm, then the outgoing flux will be: A) More in case of sphere. B) More in case of cube. C) Same in both case. D) Data Insufficient. Show Answer Correct Answer: C) Same in both case. 39. Two charges of equal magnitude kept at a distance r, exert a force F on each other. If the charges are halved and the distance between them doubled, then what is the force acting on each charge? A) F/16. B) F/4. C) 4 F. D) F/8. Show Answer Correct Answer: A) F/16. 40. If a student enters a room with a uniformly distributed air freshener, the scent intensity: A) Increases. B) Decreases. C) Remains the same as at the entrance. D) Is zero at all points. Show Answer Correct Answer: B) Decreases. 41. Unit of Electric field is A) N/C. B) V/m. C) Both A and B. D) None of the above. Show Answer Correct Answer: C) Both A and B. 42. A pith ball has an electric charge +q, and it feels a force F when placed a distance d from a second pith ball with an electric charge +q. When the second pith ball is moved to a distance 2d, the force on the pith ball is ..... A) 2F. B) 1/4 F. C) F. D) 1/2 F. Show Answer Correct Answer: B) 1/4 F. 43. Electrical force between two point charges is 200 N. If we increase 10 % charge on one of the charges and decrease 10 % charge on the other, then electrical force between them for the same distance becomes ..... A) 200 N. B) 100 N. C) 99 N. D) 198 N. Show Answer Correct Answer: D) 198 N. 44. Two unequal charges exert ..... magnitude of force on each other. A) Equal. B) Unequal. C) Zero. D) Infinite. Show Answer Correct Answer: A) Equal. 45. What is the electric field inside a charged conductor? A) Variable. B) Depends on the charge. C) Infinite. D) Zero. Show Answer Correct Answer: D) Zero. 46. Which physical quantity have unit Newton/coulomb A) Electric charge. B) Electric force. C) Electric field. D) Electric potential. Show Answer Correct Answer: C) Electric field. 47. Five students named Kiara, Shreya, Naira, Aarav, and Arjun are participating in a science experiment. Pairs (Kiara, Shreya), (Shreya, Aarav), and (Aarav, Kiara) show strong friendship, while pairs (Shreya, Naira) and (Aarav, Arjun) have conflicts. Therefore, Kiara must be: A) Neutral towards Aarav. B) Best friends with Shreya. C) Related to Arjun. D) Enemies with Naira. Show Answer Correct Answer: A) Neutral towards Aarav. 48. An electrostatic force of magnitude F exists between two metal spheres having identical charge q. The distance between their centers is r. Which combination of changes would produce no change in the electrostatic force between the spheres? A) Doubling q on both spheres while halving r. B) Doubling q on one sphere while halving r. C) Doubling q on both spheres while doubling r. D) Doubling q on one sphere while doubling r. Show Answer Correct Answer: C) Doubling q on both spheres while doubling r. 49. Which Quantity is vector Quantity among the following- A) Electric flux. B) Electric field Intensity. C) Electric charge. D) Electric Potential. Show Answer Correct Answer: B) Electric field Intensity. 50. Charge on a body is integral multiple of $\pm e$ A) Conservation of mass. B) Conservation of energy. C) Quantization of charge. D) Conservation of charge. Show Answer Correct Answer: C) Quantization of charge. 51. Raju rubbed two balloons with a piece of wool. What will happen when the balloons are brought near each other? A) The balloons will repel each other. B) The balloons will attract each other. C) The balloons will become positively (+) charged. D) The balloons will pop. Show Answer Correct Answer: A) The balloons will repel each other. 52. What happens to the mass of a body when it is positively charged? A) Remains same. B) Slightly decreases. C) Slightly increases. D) None of the above. Show Answer Correct Answer: B) Slightly decreases. 53. Two protons are released from rest, with only the electrostatic force acting. Which of the following statements is NOT true about them as they move apart? A) Their acceleration keeps decreasing. B) Their electric potential energy keeps increasing. C) Their electric potential energy keeps decreasing. D) Their kinetic energy keeps increasing. Show Answer Correct Answer: B) Their electric potential energy keeps increasing. 54. An electric dipole is placed in an electric field of a point charge, then ..... A) Torque acting on it is always zero. B) The resultant force acting on the dipole may be zero. C) Torque acting on it may be zero. D) The resultant force acting on the dipole is always zero. Show Answer Correct Answer: C) Torque acting on it may be zero. 55. Potential at any point inside a charged hollow sphere: A) Is a constant. B) Decreases with distance from centre. C) Is zero. D) Increases with distance. Show Answer Correct Answer: A) Is a constant. 56. A circular disc of radius R is placed in a magnetic field of strength B. What is the net magnetic flux linked with the disc? A) $B\times2\pi r$. B) $B\times\pi r^2$. C) Zero. D) $B\times4\pi r^2$. Show Answer Correct Answer: C) Zero. 57. As the value of r increases, what happens to the value of F? A) F never changes, q does. B) Cannot know from the information. C) F decreases. D) F increases. Show Answer Correct Answer: C) F decreases. 58. Electric intensity, at any point, in the equatorial plane of a di-pole is: A) $\frac{p}{4\pi\epsilon_0r^3}$. B) $\frac{2p}{4\pi\epsilon_0r^3}$. C) $\frac{p}{4\pi\epsilon_0r^2}$. D) $\frac{2p}{4\pi\epsilon_0r^2}$. Show Answer Correct Answer: A) $\frac{p}{4\pi\epsilon_0r^3}$. 59. Electric charges that are alike ..... each other. A) Attract. B) Repel. C) All the above. D) None of the above. Show Answer Correct Answer: B) Repel. 60. The space around an electric charge that causes them to attract and repel is called A) Gravity. B) Electric Field. C) Magnetism. D) None of the above. Show Answer Correct Answer: B) Electric Field. ← PreviousNext →Related QuizzesScience QuizzesClass 12 QuizzesClass 12 Physics (Part I) Chapter 1 Electric Charges And Fields Quiz 1Class 12 Physics (Part I) Chapter 1 Electric Charges And Fields Quiz 3Class 12 Physics (Part I) Chapter 1 Electric Charges And Fields Quiz 4Class 12 Physics (Part I) Chapter 2 Electrostatic Potential And Capacitance QuizClass 12 Physics (Part I) Chapter 3 Current Electricity QuizClass 12 Physics (Part I) Chapter 4 Moving Charges And Magnetism QuizClass 12 Physics (Part I) Chapter 5 Magnetism And Matter QuizClass 12 Physics (Part I) Chapter 6 Electromagnetic Induction Quiz 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books