This quiz works best with JavaScript enabled. Home > Cbse > Class 12 > Science > Physics Part I > Class 12 Physics (Part I) Chapter 3 Current Electricity – Quiz 9 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 9 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A 60-watt light bulb carries a current of 0.5 A. The total charge passing through it in one hour is: A) 3600 C. B) 2400 C. C) 1800 C. D) 3000 C. Show Answer Correct Answer: C) 1800 C. 2. Which of the following statements about a parallel circuit that has bulbs on each wire is not correct? A) If one bulb filament breaks the other bulbs will remain on. B) Switches can be placed throughout the circuit so that different bulbs can be turned on and off. C) The current around the circuit will be the same at all points. D) Parallel circuits are used in the home for lighting. Show Answer Correct Answer: C) The current around the circuit will be the same at all points. 3. ..... is neutral in nature. A) Electron. B) Proton. C) Neutron. D) None of the above. Show Answer Correct Answer: C) Neutron. 4. What's the difference between a solenoid and an electromagnet? A) Solenoids do not use a power source. B) Solenoids include a nail inside the coils. C) Electromagnets do no use wire. D) Electromagnets include a nail inside the coils. Show Answer Correct Answer: D) Electromagnets include a nail inside the coils. 5. What factors affect the resistance of a conductor? A) Material, length, thickness, and temperature. B) Material, voltage, current, and temperature. C) Length, voltage, current, and temperature. D) Thickness, voltage, current, and temperature. Show Answer Correct Answer: A) Material, length, thickness, and temperature. 6. Which two objects are necessary to complete an electric circuit? A) A light bulb and a switch. B) A power source and a light bulb. C) A path for energy to flow and a switch. D) A power source and a path for energy to flow. Show Answer Correct Answer: D) A power source and a path for energy to flow. 7. If a circuit has a voltage of 9 volts and a resistance of 3 ohms, what is the current flowing through the circuit? A) 3 amperes. B) 12 amperes. C) 27 amperes. D) 0.33 amperes. Show Answer Correct Answer: A) 3 amperes. 8. What is a storage cell? A) A one-use source of electrical energy. B) A re-chargeable source of electrical energy. C) A one-use source of solar electricity. D) None of the above. Show Answer Correct Answer: B) A re-chargeable source of electrical energy. 9. If voltage applied to a circuit that obeys Ohm's law is tripled the resistance will ..... A) Not change. B) Double. C) Decrease by one third. D) Triple as will. Show Answer Correct Answer: A) Not change. 10. Closed pathway that electricity flows through A) Insulator. B) Circuit. C) Conductor. D) Battery. Show Answer Correct Answer: B) Circuit. 11. When socks stick together in the dryer, there is a buildup of ..... charges on one sock and positive charges on the other sock. A) Positive. B) Wet. C) Negative. D) No. Show Answer Correct Answer: C) Negative. 12. What is the relationship between resistance and conductance? A) Resistance and conductance are inversely related; G = 1/R. B) Conductance is the same as resistance in all cases. C) Resistance increases with higher conductance values. D) Resistance and conductance are directly related; G = R. Show Answer Correct Answer: A) Resistance and conductance are inversely related; G = 1/R. 13. What is a formula to calculate Current A) I =V*R. B) I=Q*t. C) I = R/V. D) I=Q/t. Show Answer Correct Answer: D) I=Q/t. 14. Two bulbs 40 W and 60 W and rated voltage 240 V are connected in series across a potential difference of 420 V. Which bulb will fuse? A) 40 W. B) 60 W. C) Both 40 W and 60 W. D) None of the bulbs. Show Answer Correct Answer: A) 40 W. 15. The current in a conductor varies with time t as I=2t+3 $t^2$ A) 33C. B) 24C. C) 44C. D) 10C. Show Answer Correct Answer: B) 24C. 16. Calculate the current flowing through a wire of resistance 10 $\Omega$ connected to a battery of potential difference 30 V. A) 300 A. B) 0.333 A. C) 3 A. D) None of the above. Show Answer Correct Answer: C) 3 A. 17. When a conducting wire is stretched to double its initial length, then which property of conducting wire increases? A) Resistivity. B) Density. C) Volume. D) Resistance. Show Answer Correct Answer: D) Resistance. 18. The amount of charge flowing through a cross-sectional area of a wire per unit of time is called: A) Resistance. B) Work. C) Power. D) Voltage. E) Current. Show Answer Correct Answer: E) Current. 19. As the temperature of a conductor increases both it's Resistivity and Conductivity change.Will the ratio of its Resistivity and conductivity A) Increases. B) Decreases. C) Remain same. D) None of these. Show Answer Correct Answer: A) Increases. 20. What does a turbine spin through to generate an electrical current? A) A magnetic field. B) A water stream. C) A wind tunnel. D) None of the above. Show Answer Correct Answer: A) A magnetic field. 21. What is the direction of positive charge flow in a circuit? A) In a clockwise direction. B) From negative to positive terminal. C) From positive to negative terminal. D) In a counterclockwise direction. Show Answer Correct Answer: C) From positive to negative terminal. 22. A build up of electrical charges in an object A) Static Electricity. B) Current Electricity. C) All the above. D) None of the above. Show Answer Correct Answer: A) Static Electricity. 23. According to Ohm's Law, if you were to double the voltage and double the resistance, what would happen to the flow of current? A) It would stay the same. B) It would increase 2x. C) It would increase 4x. D) It would decrease 2x. Show Answer Correct Answer: A) It would stay the same. 24. Why is static electricity not useful as a power source? A) Because electrons aren't transferred in burst of static electricity. B) Because ALL energy is released at once in static electricity. C) Because static electricity is not a real form of electricity. D) Because static electricity only occurs in lightening. Show Answer Correct Answer: B) Because ALL energy is released at once in static electricity. 25. Two resistors of resistance 3 ohm and 5 ohm are connected in series. Another resistor of 6 ohm is connected in parallel to the above two resistors. If this arrangement is connected to a 10 V battery then what is the current withdrawn by the combination? A) 2 A. B) 2.9 A. C) 0.34 A. D) None of above. Show Answer Correct Answer: B) 2.9 A. 26. A flaw in a circuit that allows a large current to flow through where it isn't wanted is called ..... A) A conductor. B) A short circuit. C) An open circuit. D) An insulator. Show Answer Correct Answer: B) A short circuit. 27. Kirchhoff's current law states that A) Total sum of currents meeting at the junction is zero. B) Algebraic sum of the currents meeting at the junction is zero. C) No current can leave the junction without some current entering it. D) Net current flow at the junction is positive. Show Answer Correct Answer: B) Algebraic sum of the currents meeting at the junction is zero. 28. How many electrons pass through a lamp in 1 minute if the current is 300 mA A) 1.125 X $10^{20}$. B) $10^{25}$. C) 1.6 X $10^{-19}$. D) None of the above. Show Answer Correct Answer: A) 1.125 X $10^{20}$. 29. The particle that revolves around the nucleus. A) Proton. B) Electron. C) Neutron. D) None of the above. Show Answer Correct Answer: B) Electron. 30. In a parallel circuit, how does the total current compare to individual branch currents? A) The total current is independent of the branch currents. B) The total current is equal to the largest branch current. C) The total current is the sum of the individual branch currents. D) The total current is the average of the branch currents. Show Answer Correct Answer: C) The total current is the sum of the individual branch currents. 31. This force occurs when ions/atoms create attractive and repulsive forces. A) Electric. B) Magnetic. C) Electromagnetic. D) None of the above. Show Answer Correct Answer: A) Electric. 32. What quantity describes the opposition to the flow of electrons in an electrical circuit? A) Electric Current. B) Electrical Power. C) Voltage. D) Electric Resistance. Show Answer Correct Answer: D) Electric Resistance. 33. With the engine running the charging system produces 14.5 Volts what would the current flow be if a resistance of 6 Ohms was present A) 2.52 Ohms. B) 2.41 Ohms. C) 0.3333 Ohms. D) 2.1 Ohms. Show Answer Correct Answer: B) 2.41 Ohms. 34. In order to work, an electromagnet must be part of A) An open circuit. B) An electric crane. C) An electrical circuit. D) Battery. Show Answer Correct Answer: C) An electrical circuit. 35. A string of lights is lit. They are part of a series circuit. One of the bulbs is removed. The rest of the lights will A) Stay lit. B) Get dimmer. C) Get brighter. D) Go out. Show Answer Correct Answer: D) Go out. 36. Conventionally, current is described as flowing from the ..... terminal of a battery to the ..... terminal. A) Negative positive. B) Positive negative. C) Positive positive. D) Negative negative. Show Answer Correct Answer: B) Positive negative. 37. What is the relationship between terminal voltage and electromotive force (emf) when current is drawn from a cell? A) Terminal voltage is greater than emf. B) Terminal voltage equals emf. C) Terminal voltage is independent of emf. D) Terminal voltage is less than emf. Show Answer Correct Answer: D) Terminal voltage is less than emf. 38. Which of the following correctly describes one way in which static electricity is different from the current electricity that is used in homes? A) Static electricity is a quick release of energy. B) Static electricity requires magnets and coils of wire. C) Static electricity flows at a constant rate. D) Static electricity always goes in the same direction. Show Answer Correct Answer: A) Static electricity is a quick release of energy. 39. Complete the following sentence:A current is defined as A) Electrons. B) A net flow of charge. C) The energy in a cell. D) Stationary electrons. Show Answer Correct Answer: B) A net flow of charge. 40. What is one problem with using a series circuit? A) It has a lot of series. B) If one goes down, they all go down!. C) It doesn't work properly. D) There are no problems. Show Answer Correct Answer: B) If one goes down, they all go down!. 41. Current electricity is ..... A) The flow of charged (positively) particles through an insulator. B) The flow of (negatively) charged particles through a conductor. C) I dont know. D) I dont understand. Show Answer Correct Answer: B) The flow of (negatively) charged particles through a conductor. 42. Two bulbs of 250 V and 100 W are first connected in series and then in parallel with a supply of 250 V. Total power in each of the cases will be ..... respectively. A) 50 W, 100 W. B) 100 W, 50 W. C) 50 W, 200 W. D) 200 W, 150 W. Show Answer Correct Answer: C) 50 W, 200 W. 43. Two wire of same material but of diffrent diameter carry the same current I.If the ratio of their diameter is 2:1 then corresponding ratio of theirmean drift velocities will be A) 1:1. B) 4:1. C) 1:4. D) 1:2. Show Answer Correct Answer: C) 1:4. 44. SI unit of electric current is ..... A) Coulomb. B) Volt. C) Ampere. D) Ohm. Show Answer Correct Answer: C) Ampere. 45. A series circuit has how many pathways for the electrons to flow? A) Many. B) One. C) Zero. D) Two. Show Answer Correct Answer: B) One. 46. True of False:A circuit must be open for electricity to flow and turn something on. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 47. Which of the following is a derived quantity? A) Weight. B) Time. C) Mass. D) Luminous Intensity. Show Answer Correct Answer: A) Weight. 48. What will create static electricity? A) Rubbing a plastic comb on a piece of wool. B) Flipping on a light switch in the classroom. C) Allowing like forces to attract (negative attracts a negative). D) Wrapping a wire around an iron and sending a charge through a wire. Show Answer Correct Answer: A) Rubbing a plastic comb on a piece of wool. 49. A bulb of 20 W is connected to 220 V battery. What is the resistance of the bulb? A) 2420 ohm. B) 11 ohm. C) 220 ohm. D) 484 ohm. Show Answer Correct Answer: A) 2420 ohm. 50. Movement of charge in static electricity A) Resistor. B) Fuse. C) Current. D) Discharge. Show Answer Correct Answer: D) Discharge. 51. What type of device can increase and decrease voltage? A) Transformers. B) Generators. C) Electric motors. D) Galvanometers. Show Answer Correct Answer: A) Transformers. 52. An image is formed upside down in front of mirror and seems bigger by 2 times from the actual size. What might be the type of mirror uses? A) Convex mirror. B) Concave lens. C) Concave mirror. D) Plane mirror. Show Answer Correct Answer: C) Concave mirror. 53. How much voltage is needed to create a current of 12 A in a circuit with a resistance of 5 ohms? A) 60 V. B) 2.5 V. C) 120 A. D) 60 ohms. Show Answer Correct Answer: A) 60 V. 54. What happens to the intensity or the brightness of the lamps connected in series as more and more lamps are added? A) Increases. B) Remains the same. C) Decreases. D) Cannot be predicted. Show Answer Correct Answer: C) Decreases. 55. An electric circuit with only one path for current is called a ..... A) Parallel circuit. B) Insulator. C) Series circuit. D) Resistor. Show Answer Correct Answer: C) Series circuit. 56. The focal length is equal to the: A) Half diameter of curvature. B) Diameter of curvature. C) Radius of curvature. D) Half radius of curvature. Show Answer Correct Answer: D) Half radius of curvature. 57. What will be the new resistivity of a metallic wire if it's length becomes double A) Increases two times. B) Remains same. C) Increases four times. D) Becomes half. Show Answer Correct Answer: B) Remains same. 58. An electric circuit with two or more paths for current is called ..... A) A parallel circuit. B) A series circuit. C) A short circuit. D) An open circuit. Show Answer Correct Answer: A) A parallel circuit. 59. A cpacitor is attached with cell of emf E and internal resistance r, the potential difference across capacitor A) Equal to E. B) Less than E. C) Greater than E. D) Less than and equal to E. Show Answer Correct Answer: A) Equal to E. 60. If cross-sectional area of pipe decreases, the speed of fluid must increase according to: A) Torricelli's theorem. B) Bernoulli's equation. C) Continuity equation. D) Venture relation. Show Answer Correct Answer: C) Continuity equation. ← PreviousNext →Related QuizzesScience QuizzesClass 12 QuizzesClass 12 Physics (Part I) Chapter 3 Current Electricity Quiz 1Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 2Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 3Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 4Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 5Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 6Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 7Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books