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 11 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 11 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The algebraic sum of voltages around any closed path in a network is equal to ..... A) 0. B) Negative Polarity. C) Infinity. D) 1. Show Answer Correct Answer: A) 0. 2. Electrical energy is made in ..... A) Power plants. B) Direct current. C) Alternating current. D) None of the above. Show Answer Correct Answer: A) Power plants. 3. The heat produced by 100 W heater in 2 minutes is equal to A) 10.5 kJ. B) 14.2 kJ. C) 12.0 kJ. D) 16.3 kJ. Show Answer Correct Answer: C) 12.0 kJ. 4. Within a circuit, the number of electrons flowing from the battery is ..... the number of electrons returning to the battery. A) More than. B) Less than. C) The same as. D) None of the above. Show Answer Correct Answer: C) The same as. 5. What is the role of a resistor in an electrical circuit? A) To oppose the flow of current. B) To store electrical energy. C) To increase the current. D) To decrease the voltage. Show Answer Correct Answer: A) To oppose the flow of current. 6. Parallel circuits are A) A circuit that has only one path for current to travel. B) Has more than one path for current to travel. C) A circuit that does not allow electricity to travel through it. D) Magnets that cause electric current. Show Answer Correct Answer: B) Has more than one path for current to travel. 7. Which of the following is the best definition of electromagnetism? A) The use of electrical energy to create magnets. B) The use of magnets to generate electric currents. C) The interaction between electrical energy and magnetism. D) The appearance in nature of objects that have both electric and magnetic fields. Show Answer Correct Answer: C) The interaction between electrical energy and magnetism. 8. Cathode is the ..... electrode of a battery A) Positive. B) Negative. C) All the above. D) None of the above. Show Answer Correct Answer: A) Positive. 9. When an electric field is applied across the ends of a conductor the electrons experience this ..... A) Gains kinetic energy due to electric field. B) Loses/gains kinetic energy during the collision in the direction opposite to the direction of electric field. C) Loses kinetic energy due to electric field. D) Loses / gains kinetic energy during the collision in the direction of electric field. Show Answer Correct Answer: D) Loses / gains kinetic energy during the collision in the direction of electric field. 10. What does a transformer do? A) Move electricity from place to place. B) Increase or decrease the voltage of the electricity. C) Change mechanical energy into electrical energy. D) None of the above. Show Answer Correct Answer: B) Increase or decrease the voltage of the electricity. 11. What type of energy is the electrical energy from the battery being converted into in this radio? A) Heat and light. B) Sound and light. C) Sound and heat. D) Potential energy. Show Answer Correct Answer: C) Sound and heat. 12. Which term refers to the flow of electrical charges? A) Resistance. B) Conductance. C) Energy. D) Current. Show Answer Correct Answer: D) Current. 13. Using the law of charges, identify what will happen when a positively charged object becomes neutralized. A) It gains electrons. B) It loses protons. C) It loses electrons. D) It gains protons. Show Answer Correct Answer: A) It gains electrons. 14. Electrons which are free to move around are also called A) Electron sea. B) Valence shell electrons. C) Conduction electrons. D) Inner electrons. Show Answer Correct Answer: C) Conduction electrons. 15. A ..... opens and closes a circuit? A) Magnet. B) Electromagnet. C) Switch. D) Keykey. Show Answer Correct Answer: C) Switch. 16. An ammeter must have A) Low resistance so that it does affect the current through the main circuit. B) High resistance so that it does affect the current through the main circuit. C) Low resistance so that it does affect the voltage across the resistor. D) None of the above. Show Answer Correct Answer: A) Low resistance so that it does affect the current through the main circuit. 17. A heater is rated as 220 volt 880 watt, what is the current drawn by heater when connected to 220volt ac main, calculate resistance of heater A) 55ohm. B) 35ohm. C) 45ohm. D) 25ohm. Show Answer Correct Answer: A) 55ohm. 18. You close a circuit when you turn a light off. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 19. Battery cells are connected in series to ..... A) Increase voltage output. B) Increase current capacity. C) Decrease current capacity. D) Decrease voltage output. Show Answer Correct Answer: A) Increase voltage output. 20. What happens to the resistance of a wire as its length increases, assuming all other factors remain constant? A) Resistance increases. B) Resistance remains the same. C) Resistance decreases. D) Resistance becomes zero. Show Answer Correct Answer: A) Resistance increases. 21. Which of the following is not a basic part of an electric circuit? A) A device that runs on electrical energy. B) Transformer. C) A source of electrical energy. D) Conducting wires. Show Answer Correct Answer: B) Transformer. 22. What happens when you pull a bulb out of a parallel circuit A) Electricity has another path to follow-the rest of the bulbs will still light up. B) None of the bulbs will light up you created an open circuit. C) Only every other bulb will light up. D) The bulb you pulled out will still light. Show Answer Correct Answer: A) Electricity has another path to follow-the rest of the bulbs will still light up. 23. What is a dry cell battery A) One that uses water to make electricity. B) One that uses a liquid electrolyte solution. C) One that uses a paste electrolyte. D) None of the above. Show Answer Correct Answer: C) One that uses a paste electrolyte. 24. Which of the following is NOT a good insulator? A) Plastic. B) Rubber. C) Iron. D) Wood. Show Answer Correct Answer: C) Iron. 25. Why is it important to have a switch in an electrical circuit? A) To decrease the resistance in the circuit. B) To increase the voltage of the circuit. C) To control the flow of electricity. D) To change the direction of the current. Show Answer Correct Answer: C) To control the flow of electricity. 26. When a switch is turned on, you close a circuit so that it is ..... A) Inactive. B) Broken. C) Incomplete. D) Complete. Show Answer Correct Answer: D) Complete. 27. When is it easiest for a person to build up static electricity? A) After a rainstorm when the air is warm and humid. B) During the winter when the air is dry. C) After a lightning strike when the air is full of electricity. D) During the spring when the ground is wet. Show Answer Correct Answer: B) During the winter when the air is dry. 28. What is the colour of live wire insulation? A) Blue. B) Red. C) Brown. D) Yellow. Show Answer Correct Answer: B) Red. 29. Electromagnets are strong magnets that can be turned on and off. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 30. Of the following, the copper conductor that has the least resistance is: A) Thin, long and hot. B) Thick, short and cool. C) Thick, long and hot. D) Thin, short and cool. Show Answer Correct Answer: B) Thick, short and cool. 31. A circuit that has more than one path for electricity to follow is a ..... A) Series. B) Static. C) Broken. D) Parallel. Show Answer Correct Answer: D) Parallel. 32. What unit is used to measure electric current? A) Ampere. B) Ohm. C) Watt. D) Volt. Show Answer Correct Answer: A) Ampere. 33. Generators generate A) Heat. B) Chemical energy. C) Electricity. D) Mechanical energy. Show Answer Correct Answer: C) Electricity. 34. Michael tries to pick up a small bit of plastic wrap that is on his desk. Michael's hand has a negative charge. The pieceof plastic has a positive charge. What will happen when Michael's hand gets close to the plastic? A) The plastic will neither move towards or away from Michael's hand. B) The plastic will circle around Michael's hand. C) The plastic will move away from Michael's hand. D) The plastic will move towards Michael's hand. Show Answer Correct Answer: D) The plastic will move towards Michael's hand. 35. Two resistors R1 = 6 $\Omega$ and R2 = 12 $\Omega$ are connected in parallel to each other and in series to R3 = 2 $\Omega$. An ammeter measures an electric current of 3 A flowing though resistor R3. What is the net voltage applied to the circuit? A) 18 V. B) 12 V. C) 6 V. D) 24 V. Show Answer Correct Answer: A) 18 V. 36. In which part of a circuit is electrical energy changed into other forms of energy? A) In the switch. B) In the battery. C) In the wire. D) In the load. Show Answer Correct Answer: D) In the load. 37. Electricity cannot flow through porcelain. Porcelain is therefore a(n) A) Conductor. B) Insulator. C) Electron. D) Conductor and insulator. Show Answer Correct Answer: B) Insulator. 38. Electrical cell converts A) Electrical energy to chemical energy. B) Chemical energy to electrical energy. C) Chemical to potential energy. D) None of the above. Show Answer Correct Answer: B) Chemical energy to electrical energy. 39. Charge through a cross-section of a conductor is given by Q = 5t$^{2}$-2t coulomb. Find the average current through the conductor in the interval t$_{1}$ = 2 s to t$_{2}$ = 4 s. A) 14 A. B) 56 A. C) 28 A. D) 7 A. Show Answer Correct Answer: C) 28 A. 40. Which of the following should you not do near a downed powerline? A) Stay in your car if no other danger is present. B) Make sure to keep both hands on the car when stepping out. C) Jump out and land on both feet without touching the car. D) Shuffle away in small steps until at least 35 feet away. Show Answer Correct Answer: B) Make sure to keep both hands on the car when stepping out. 41. When n equal resistances of values R are connected in parallel, then the effective resistance is ..... A) N R. B) R / n. C) N / R. D) None of the above. Show Answer Correct Answer: B) R / n. 42. The rate at which electrical energy is used may be measured in. A) Watt. B) Wattsecond. C) Joulesecond. D) Watt/second. Show Answer Correct Answer: A) Watt. 43. Which of the following is not an example of safety device? A) Earth wire. B) Circuit breaker. C) Battery. D) Fuse. Show Answer Correct Answer: C) Battery. 44. If a circuit has a voltage of 12V and a resistance of 4$\Omega$, what is the current? A) 3A. B) 4A. C) 2A. D) 6A. Show Answer Correct Answer: A) 3A. 45. Which will make an electromagnet WEAKER? A) An extra battery attached. B) More coils of wire around nail. C) Remove one of the nails from the coils. D) Thicker wire. Show Answer Correct Answer: C) Remove one of the nails from the coils. 46. Two cells when connected in series are balanced on 8m on a potentiometer. If the cells are connected with polarities of one of the cell is reversed, they balance on 2m. The ratio of e.m.f.'s of the two cells is A) 3:4. B) 3:5. C) 4:3. D) 5:3. Show Answer Correct Answer: D) 5:3. 47. Current is given as A) I = R/V. B) V = W/q. C) Q = I/E. D) I = Q/E. Show Answer Correct Answer: D) I = Q/E. 48. Why are homes not wired in series circuits? A) The house will burn down. B) If you turn off one appliance, the rest will turn off. C) Homes are wired in series circuits. D) None of the above. Show Answer Correct Answer: B) If you turn off one appliance, the rest will turn off. 49. When a magnet is able to move freely, its North pole will A) Point to the Earth's magnetic North pole. B) Spin wildly. C) Point to the Earth's geographic North pole. D) Point to the Earth's South pole. Show Answer Correct Answer: A) Point to the Earth's magnetic North pole. 50. True or False:In an electric circuit of an automobile, the 12-Volt car battery is sometimes referred to as the internal circuit because it is located inside of the hood of the car. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 51. The difference between attract and repel is that to attract is to pull something closer and repel is to push something away. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 52. What is the relationship between current and resistance in a circuit? A) Current is inversely proportional to resistance. B) Current is directly proportional to resistance. C) Current is independent of resistance. D) Current is exponentially related to resistance. Show Answer Correct Answer: A) Current is inversely proportional to resistance. 53. What does the Greek letter $\Omega$ (Omega) represent? A) Watts. B) Ohms. C) Amps. D) Volts. Show Answer Correct Answer: B) Ohms. 54. Which of the following is an example of a source of Direct Current (DC)? A) Batteries. B) Alternators. C) Generators. D) None of the above. Show Answer Correct Answer: A) Batteries. 55. You have a flashlight with a 1.5V battery and an incandescent lamp that draws 0.2A. What is the filament resistance? A) 7.5 ohms. B) .133 ohms. C) 3 ohms. D) 75 ohms. Show Answer Correct Answer: A) 7.5 ohms. 56. In a simple circuit, what happens to the current if the resistance is doubled while the voltage remains constant? A) The current is halved. B) The current remains the same. C) The current becomes zero. D) The current doubles. Show Answer Correct Answer: A) The current is halved. 57. If n cells of emf E and internal resistance r are connected in series, then current drawn through external resistance R is A) I= nE/ R + nr. B) I= nE/ nR + r. C) I= E/ R + nr. D) I= E/R+r/n. Show Answer Correct Answer: A) I= nE/ R + nr. 58. Emf of a cell is(a) A) The maximum potential difference between the terminals of a cell when no current is drawn from the cell. B) The force required to push the electrons in the circuit. C) The potential difference between the positive and negative terminal of a cell in a closed circuit. D) Less than terminal potential difference of the cell. Show Answer Correct Answer: A) The maximum potential difference between the terminals of a cell when no current is drawn from the cell. 59. Which of the following represents the definition of an amp? A) Cs. B) S/C. C) C/s. D) J/C. Show Answer Correct Answer: C) C/s. 60. In a parallel circuit with three light bulbs, if one of the light bulbs were removed, the other light bulbs would ..... A) Not work. B) Short circuit. C) Turn off. D) Continue working. Show Answer Correct Answer: D) Continue working. ← 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