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 8 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 8 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is the direction of conventional current? A) Positive terminal to negative terminal. B) Negative terminal to positive terminal. C) Depends on the condition. D) None. Show Answer Correct Answer: A) Positive terminal to negative terminal. 2. A battery with an emf of 24 V is connected to a 6-$\Omega$ resistor. As a result, current of 3 A exists in the resistor. The terminal potential difference of the battery is: A) 0. B) 12V. C) 6V. D) 18V. Show Answer Correct Answer: D) 18V. 3. When a 4 ohm resistor is connected across the terminals of a 2 V battery, the number of coulombs passing through the resistor per second is ..... A) 1. B) 2. C) 0.5. D) 4. Show Answer Correct Answer: C) 0.5. 4. Drift velocity of electrons in a conductor occurs when A) External electric field is applied. B) No electric field is required. C) It is thermal velocity of electrons. D) None of the above. Show Answer Correct Answer: A) External electric field is applied. 5. Voltage is measured in what? A) Watts. B) Ohms. C) Volts. D) Amperes. Show Answer Correct Answer: C) Volts. 6. What is the difference between a conductor and an insulator? A) An insulator allows electricity to flow through it easily and a conductor does not. B) A conductor allows electricity to flow through it easily and an insulator does not. C) An insulator is magnetic and a conductor is not. D) A conductor is magnetic and an insulator is not. Show Answer Correct Answer: B) A conductor allows electricity to flow through it easily and an insulator does not. 7. The resistance of a nichrome wire at 0$^{0}$ C is 10 ohm. If its temperature co efficient of resistance is 0.004/$^{0}$C, what is the resistance at boiling point of water? A) 15 ohm. B) 14 ohm. C) 10 ohm. D) 1.4 ohm. Show Answer Correct Answer: B) 14 ohm. 8. What happens when two unlike charges are placed near each other? A) They will pull away from each other. B) They attract. C) Nothing happens. D) They form electromagnetic waves. Show Answer Correct Answer: B) They attract. 9. What is the abbreviation for the ampere unit? A) W. B) V. C) A. D) C. Show Answer Correct Answer: C) A. 10. The SI Unit of electric potential is the ampere A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 11. A battery can be used to produce an electric current. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 12. As the magnet moves back and forth, the light bulb indicates which of the following? A) Current. B) Magnetism. C) Temperature. D) Conductivity. Show Answer Correct Answer: A) Current. 13. Clara added another light to an electrical circuit and all the lights became dimmer. What is the most likely cause of the dimmer lights? A) The batteries are weak. B) The light bulbs are hot. C) The circuit is a parallel circuit. D) The circuit is a series circuit. Show Answer Correct Answer: D) The circuit is a series circuit. 14. Fill in the blank:Like Charges will ..... one another. A) Repel. B) Attract. C) Discharge. D) Neutralize. E) Short Circuit. Show Answer Correct Answer: A) Repel. 15. Why Nichrome is used in heaters? A) It has low melting point. B) It has high specific resistance. C) Low specific resistance. D) None of the above. Show Answer Correct Answer: B) It has high specific resistance. 16. What is the role of a fuse in an electrical circuit? A) To protect the circuit by breaking the connection if the current is too high. B) To decrease voltage. C) To increase current. D) To store electrical energy. Show Answer Correct Answer: A) To protect the circuit by breaking the connection if the current is too high. 17. Which of the following determines whether or not a material is magnetic? A) The weight of the material on Earth. B) The number of elements that make up the material. C) The alignment of atoms in the material. D) The density of the material. Show Answer Correct Answer: C) The alignment of atoms in the material. 18. A potentiometer having wire 1000cm long stretched on it is connected to a battery having a steady voltage, A Daniel cell gives a null point at 400cm. if the length of potentiometer wire increased by 200cm find the new position of null point A) 400cm. B) 440cm. C) 480cm. D) 360cm. Show Answer Correct Answer: C) 480cm. 19. Which components could complete an electric circuit? A) Wire, bulb, switch. B) Battery, wire, switch. C) Battery, bulb, switch. D) Battery, wire, bulb. Show Answer Correct Answer: D) Battery, wire, bulb. 20. How does current electricity differ from static electricity in terms of electron movement? A) Current electricity involves a steady flow of electrons, while static electricity involves a sudden discharge. B) Static electricity involves a steady flow of electrons, while current electricity involves a sudden discharge. C) Both involve a steady flow of electrons. D) Both involve a sudden discharge of electrons. Show Answer Correct Answer: A) Current electricity involves a steady flow of electrons, while static electricity involves a sudden discharge. 21. How is an electromagnet like a bar magnet? A) They are both made of wire. B) They both need electricity to work. C) They both have a N pole and a S pole. D) They are both strong permanent magnets. Show Answer Correct Answer: C) They both have a N pole and a S pole. 22. Why do clothes often stick together after being in a dryer? A) Because of the heat generated by the dryer. B) Due to the magnetic properties of the fabric. C) Due to static electricity generated by friction. D) Because of the moisture left in the clothes. Show Answer Correct Answer: C) Due to static electricity generated by friction. 23. The electrons that can move freely inside the metals are called ..... electrons. A) Insulators. B) Conduction. C) Conductors. D) None of the above. Show Answer Correct Answer: B) Conduction. 24. The resistance of a wire is R. If the length of the wire is doubled by stretching, then the new resistance will be A) R/4. B) 2 R. C) 4 R. D) R. Show Answer Correct Answer: C) 4 R. 25. Three resistors of 2.5Ohms, 10 Ohms and 6.5Ohms are connected in series. what single resistor can replace them A) 19 $\Omega$. B) 6.33 $\Omega$. C) 18.5 $\Omega$. D) None of the above. Show Answer Correct Answer: A) 19 $\Omega$. 26. N resistances, each of r $\Omega$, when connected in parallel give an equivalent resistance of R $\Omega$. If these resistances were connected in series, the combination would have a resistance in ohms A) R / n$^{2}$. B) R / n. C) NR. D) N$^{2}$R. Show Answer Correct Answer: D) N$^{2}$R. 27. Current is a ..... quantity A) Vector. B) Low. C) High. D) Scalar. Show Answer Correct Answer: D) Scalar. 28. To get current electricity, you must have a path or circuit for the electrons to move. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 29. Insulator or Conductor?STEEL A) Insulator. B) Conductor. C) All the above. D) None of the above. Show Answer Correct Answer: B) Conductor. 30. J of heat is produced each second in a 4$\Omega$ resistor. The potential difference across the resistor will be: A) 25 V. B) 20 V. C) 10 V. D) 30 V. Show Answer Correct Answer: C) 10 V. 31. When several light bulbs are connected in a series circuit, what will happen if one bulb burns out? A) All of the light bulbs will go out. B) The other bulbs will continue to burn. C) The other bulbs will burn together. D) There will be a short circuit. Show Answer Correct Answer: A) All of the light bulbs will go out. 32. Dimension of Electric Current A) MLT. B) LA. C) AT. D) A. Show Answer Correct Answer: D) A. 33. Which of the following is not the expression for power? A) P = I$^{2}$/R. B) P = VI. C) P = I$^{2}$ R. D) P = V$^{2}$/R. Show Answer Correct Answer: A) P = I$^{2}$/R. 34. Which type of energy produces Carbon Dioxide, which can be harmful to our planet and cause pollution? A) Solar Energy. B) Wind Energy. C) Fossil Fuels (Coal, oil, and gas). D) Nuclear Energy. Show Answer Correct Answer: C) Fossil Fuels (Coal, oil, and gas). 35. Resistance is measured in what units? A) Amperes. B) Volts. C) Ohms. D) Kapernicks. Show Answer Correct Answer: C) Ohms. 36. Which sign is associated with a negative charge? A) -. B) =. C) $. D) +. Show Answer Correct Answer: A) -. 37. By increasing the temperature the resistance of a conductor A) Increases. B) Decreases. C) Remains constant. D) Initially increases then decreases. Show Answer Correct Answer: A) Increases. 38. An object that is positively charged contains an excess of: A) Protons. B) Positrons. C) Electrons. D) Neutrons. Show Answer Correct Answer: A) Protons. 39. A ..... is good at conducting electricity A) Conductor. B) Resistor. C) Circuit. D) None of the above. Show Answer Correct Answer: A) Conductor. 40. Negative charge moving through a wire A) Static Electricity. B) Current Electricity. C) All the above. D) None of the above. Show Answer Correct Answer: B) Current Electricity. 41. Why would two electrons repel each other if they were close together? A) They have like charges, so they experience an attractive force. B) They have opposite charges, so they experience an attractive force. C) They have like charges, so they experience a repulsive force. D) They have opposite charges, so they experience repulsive forces. Show Answer Correct Answer: C) They have like charges, so they experience a repulsive force. 42. Which has low resistance? A) Long wire. B) Insulated wire. C) Thick wire. D) Thin wire. Show Answer Correct Answer: C) Thick wire. 43. What is the slope of the I-V graph for a metallic conductor? A) Current. B) Conductance. C) Resistance of the conductor. D) Potential difference. Show Answer Correct Answer: C) Resistance of the conductor. 44. Static electricity occurs when charges build up on an object instead of flowing. The static charge on the object can build up in one of four ways. Which of the following is NOT one of those four ways? A) Friction. B) Convection. C) Conduction. D) Induction. Show Answer Correct Answer: B) Convection. 45. There is only one path for the electrons to follow A) Conductor. B) Insulator. C) Parallel circuit. D) Series circuit. Show Answer Correct Answer: D) Series circuit. 46. ..... is a scalar quantity. A) Velocity. B) Force. C) Electric current. D) Acceleration. Show Answer Correct Answer: C) Electric current. 47. What is the unit of charge? A) Ampere. B) Coulomb. C) Volt. D) None of these. Show Answer Correct Answer: B) Coulomb. 48. Electrical energy can be changed to ..... energy in stoves, toasters, and ovens. A) Sound. B) Motion. C) Heat. D) Light. Show Answer Correct Answer: C) Heat. 49. How is potential difference measured in a circuit? A) Voltmeter. B) Ohmmeter. C) Ammeter. D) Wattmeter. Show Answer Correct Answer: A) Voltmeter. 50. An electric current flowing in a wire creates ..... around the wire A) Magnetism. B) Electric. C) Potential. D) Electromagnetism. Show Answer Correct Answer: A) Magnetism. 51. Electricity flows 1 way one path A) Series circuit. B) Static electricity. C) Short circuit. D) Parallel circuit. Show Answer Correct Answer: A) Series circuit. 52. Electrons flow from the ..... terminal of the battery to the ..... terminal of the battery. A) Positive to negative. B) Negative to positive. C) All the above. D) None of the above. Show Answer Correct Answer: B) Negative to positive. 53. A potential difference across 24 $\Omega$ resistor is 12 V . What is the current through the resistor? A) 0.2 A. B) 0.5 A. C) 0.4 A. D) 0.3 A. Show Answer Correct Answer: B) 0.5 A. 54. Materials that easily loose or accept electrons are considered A) Good conductors. B) Good anti-static agents. C) Good insulators. D) Good for storing charge. Show Answer Correct Answer: A) Good conductors. 55. What type of electricity is used for our lights, motors, devices, etc? A) Static electricity. B) Current electricity. C) All the above. D) None of the above. Show Answer Correct Answer: B) Current electricity. 56. Six identical cells, each of emf of 6V, are connected in parallel, The net emf across the battery is A) 6V. B) 36V. C) 0 V. D) Between 6v and 36 v. Show Answer Correct Answer: A) 6V. 57. When does Ohm's law hold true? A) When the material of the conductor is changed. B) When the thickness of the conductor is increased. C) When the length of the conductor is doubled. D) When the temperature of the conductor remains constant. Show Answer Correct Answer: D) When the temperature of the conductor remains constant. 58. How can the electric charge be established? A) Electrons can be removed from atoms and accumulated to produce a negative charge. B) Atoms from which electrons have been removed produce a positive electric charge. C) Both A and B. D) Neither A nor B. Show Answer Correct Answer: C) Both A and B. 59. As more resistors are added in series to a constant voltage source, the power supplied by the source A) Increases. B) Decreases. C) Does not change. D) Increases for a time and then starts to decrease. Show Answer Correct Answer: B) Decreases. 60. If two batteries are in a circuit and the positive side is touching the positive side will the circuit work? A) Yes. B) No. C) All the above. D) None of the above. Show Answer Correct Answer: B) No. ← 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 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books