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 6 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 6 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. This is how much a material opposes, or resists, the flow of electric current. A) Filament. B) Resistance. C) Electromagnet. D) None of the above. Show Answer Correct Answer: B) Resistance. 2. Which of the items is a conductor? A) Wood. B) Cardboard. C) Copper. D) Foam. Show Answer Correct Answer: C) Copper. 3. Three wires of resistance 3 ohms are connected in parallel. the effective resistance of the configuration is A) 9 ohm. B) 2 ohm. C) 1 ohm. D) 6 ohm. Show Answer Correct Answer: C) 1 ohm. 4. How does electricity travel from power plants to your house? A) Through a series of generators. B) Through a series of many transformers. C) It travels through the air as electromagnetic waves. D) Through transmission wires. Show Answer Correct Answer: D) Through transmission wires. 5. Jacob tested a material in the science lab. He put it between a wire and a battery in a closed circuit. What evidence might have led him to decide the material is a conductor? A) The light bulb turned on. B) He created a short circuit. C) The battery lost its energy. D) The wire did not get hot. Show Answer Correct Answer: A) The light bulb turned on. 6. Which of the following represents the definition of a volt? A) J/C. B) C/s. C) JC. D) J. Show Answer Correct Answer: A) J/C. 7. Proton possess ..... charge whereas electron possess ..... charge. A) Neutral, positive. B) Negative, positive. C) Positive, negative. D) None of the above. Show Answer Correct Answer: C) Positive, negative. 8. The unit of electric power is A) Joule. B) Watt. C) Volt. D) KWh. Show Answer Correct Answer: D) KWh. 9. In electrolyte charge carries are A) Holes. B) Electrons. C) Ions. D) Both options 2 and 3. Show Answer Correct Answer: C) Ions. 10. Which of these is not a magnetic material? A) Steel. B) Iron. C) Nickel. D) Aluminium. Show Answer Correct Answer: D) Aluminium. 11. What happens to the current when a switch opens in a circuit? A) It increases. B) It stops flowing. C) It reverses direction. D) It decreases. Show Answer Correct Answer: B) It stops flowing. 12. In a simple series circuit, why does the bulb light when you close the switch? A) A. Because the switch produces electricity. B) B. Because closing the switch completes the circuit. C) C. Because closing the switch breaks the circuit. D) None of the above. Show Answer Correct Answer: B) B. Because closing the switch completes the circuit. 13. What is the unit of charge measured in? A) Amperes. B) Coulombs. C) Joules. D) Volts. Show Answer Correct Answer: B) Coulombs. 14. When the switch is ..... , the lights are off. A) Open. B) Closed. C) All the above. D) None of the above. Show Answer Correct Answer: A) Open. 15. What are filaments? A) Resistor's in the toaster's circuit. B) Wires that heat up when they conduct electricity. C) Both. D) None of the above. Show Answer Correct Answer: C) Both. 16. What is the purpose of increasing the voltage in a transformer at the power plant? A) To reduce energy loss over long distances. B) To increase energy consumption. C) To make electricity safer for home use. D) None of the above. Show Answer Correct Answer: A) To reduce energy loss over long distances. 17. Which change would result in a stronger electromagnet? A) Reducing the number of batteries. B) Substituting another metal for the iron core. C) Decreasing the number of coils around the iron core. D) Increasing the voltage of the battery. Show Answer Correct Answer: D) Increasing the voltage of the battery. 18. If two identical cells, when connected in series or in parallel, supply same amount of current through an external resistance of 2 ohm .the internal resistance of each cell is A) 6 ohm. B) 1 ohm. C) 2 ohm. D) 4 ohm. Show Answer Correct Answer: C) 2 ohm. 19. Current is a Vector Quantity A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 20. True or False:The path of charge flow from the + to the-terminal of the circuit can consist of nonconductive material. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 21. In a series circuit, which of the following is the same throughout the circuit? A) Current. B) Resistance. C) Power. D) Voltage. Show Answer Correct Answer: A) Current. 22. An ampere is measured in ..... A) Seconds. B) Minutes. C) Hours. D) None of the above. Show Answer Correct Answer: A) Seconds. 23. What is the potential difference between points A and B if a charge of 5C does 100 joules of work? A) 20V. B) 500V. C) 0.05V. D) None of the above. Show Answer Correct Answer: A) 20V. 24. Which of these causes static electricity? A) Electrical outlets. B) Electrons floating in the air. C) Electrons moving from one object to another. D) Electrical circuits. Show Answer Correct Answer: C) Electrons moving from one object to another. 25. Which of the following quantities will be same for all the parts in series circuit? A) Power. B) Resistance. C) Voltage. D) Current. Show Answer Correct Answer: D) Current. 26. A parallel circuit has A) Only one path for the electric charges to follow. B) Multiple paths for the electric charges to follow. C) All the above. D) None of the above. Show Answer Correct Answer: B) Multiple paths for the electric charges to follow. 27. The function of the circuit breaker is A) To safeguard the circuit. B) On and off the circuit. C) To save human life. D) None of these. Show Answer Correct Answer: A) To safeguard the circuit. 28. When a wire is stretched and its radius becomes r/2. then its resistance will be A) 4R. B) 2R. C) 0. D) 16 R. Show Answer Correct Answer: D) 16 R. 29. What 'flows' in a wire? A) Atoms. B) Protons. C) Electrons. D) Neutrons. Show Answer Correct Answer: C) Electrons. 30. An electric field is ..... A) Where a resister is placed in a circuit. B) A parallel circuit. C) The area around electric charges, where electric forces can act. D) A series circuit. Show Answer Correct Answer: C) The area around electric charges, where electric forces can act. 31. ..... is a sudden discharge of electricity. A) Thunder. B) Lightning. C) None of the above. D) None of the above. Show Answer Correct Answer: B) Lightning. 32. What is the equivalent resistance of two 6$\Omega$ resistors in parallel? A) 2$\Omega$. B) 12$\Omega$. C) 3$\Omega$. D) 4$\Omega$. Show Answer Correct Answer: C) 3$\Omega$. 33. Name the positive terminal of the dry cell A) Divisor. B) Manganese dioxide. C) Graphite rod. D) Zinc cover. Show Answer Correct Answer: C) Graphite rod. 34. Current that reverses direction in a regular pattern is called ..... A) Alternating current. B) Circuit current. C) Magnetic current. D) Direct current. Show Answer Correct Answer: A) Alternating current. 35. What is the cause of resistance in a conductor? A) The flow of electrons. B) The potential difference. C) The positive ions. D) The collisions between electrons and positive ions. Show Answer Correct Answer: D) The collisions between electrons and positive ions. 36. When two objects are rubbed together, some negatively charged particles from one object can be transferred to another object. What will happen if the objects have the same charge? A) They will repel each other. B) They will not act differently. C) They will attract each other. D) They will create a spark. Show Answer Correct Answer: A) They will repel each other. 37. What type of electricity do we use everyday? A) Static electricity. B) Electric current. C) All the above. D) None of the above. Show Answer Correct Answer: B) Electric current. 38. State the SI unit of resistance. A) Watt (W). B) Volt (V). C) Ohm ($\Omega$). D) Ampere (A). Show Answer Correct Answer: C) Ohm ($\Omega$). 39. How much time is required for an operating 60-watt light bulb to use 120 joules of electrical energy? A) 2 sec. B) .2 sec. C) .5 sec. D) 5 sec. Show Answer Correct Answer: A) 2 sec. 40. In transferring 5 C charge through a wire, 25 J of work is done. Find the potential difference across the wire. A) 5 V. B) 0.2 V. C) 125 V. D) None of the above. Show Answer Correct Answer: A) 5 V. 41. The relationship between electricity and magnetism is called A) Electromagnetism. B) Electrical energy. C) Induced current. D) Ferromagnetism. Show Answer Correct Answer: A) Electromagnetism. 42. What happens to the total current in a series circuit if one component fails? A) The total current drops to zero. B) The total current increases significantly. C) The total current remains the same. D) The total current fluctuates randomly. Show Answer Correct Answer: A) The total current drops to zero. 43. Vincent is listing the ways that he could increase the magnetic field of the solenoid he made. Which of the following can he add to his list? A) Increasing the number of loops. B) Spacing the loops farther apart. C) Decreasing the current. D) Adding an insulating core. Show Answer Correct Answer: A) Increasing the number of loops. 44. The transfer of what type of atomic particle is responsible for the static charges on objects? A) Neutrons. B) Protons. C) Electrons. D) None of these. Show Answer Correct Answer: C) Electrons. 45. Conducts electricity around a circuit A) Insulator. B) Switch. C) Wire. D) Light bulb. Show Answer Correct Answer: C) Wire. 46. Two wires of A and B with circularcross section are made up of the samematerial with equal lengths. SupposeR$_{A }$= 3 R$_{B}$, then what is the ratio ofradius of wire A to that of B? A) 1/(3)$^{1/2}$. B) (3)$^{1/2}$. C) 1/3. D) 3. Show Answer Correct Answer: A) 1/(3)$^{1/2}$. 47. What is a common real-world example of static electricity? A) Clothes sticking together in a dryer. B) A battery powering a remote. C) A light bulb glowing. D) A fan spinning. Show Answer Correct Answer: A) Clothes sticking together in a dryer. 48. What is the unit of current density? A) A m$^{-1}$. B) A m$^{-2}$. C) Ampere m. D) Ampere. Show Answer Correct Answer: B) A m$^{-2}$. 49. What is the main difference between static electricity and current electricity? A) Static electricity is stationary, while current electricity flows. B) Static electricity flows, while current electricity is stationary. C) Both are stationary forms of electricity. D) Both are flowing forms of electricity. Show Answer Correct Answer: A) Static electricity is stationary, while current electricity flows. 50. If resistance of a circuit is tripled, and the voltage stays the same, the current will ..... A) Double. B) Not change. C) Decrease by one third. D) Triple. Show Answer Correct Answer: C) Decrease by one third. 51. Two type of charges in electric and magnetic forces are A) North and south. B) East and west. C) Positive and negative. D) Beyonce. Show Answer Correct Answer: C) Positive and negative. 52. The p.d across a component is 1 V and the current that flows through it is 1 A. What is its resistance? A) 10 $\Omega$. B) 1 $\Omega$. C) 0.5 $\Omega$. D) 2 $\Omega$. Show Answer Correct Answer: B) 1 $\Omega$. 53. What is the effect of increasing the length of a conductor on its resistance? A) Decreases resistance. B) No effect. C) Doubles resistance. D) Increases resistance. Show Answer Correct Answer: D) Increases resistance. 54. Electrical insulators have ..... resistance to the movement of electrons. A) High. B) Low. C) No. D) None of the above. Show Answer Correct Answer: A) High. 55. An example of the best insulator is A) Copper. B) Salt. C) Plastic. D) Sand. Show Answer Correct Answer: C) Plastic. 56. 10$^{6}$ electrons are moving through a wire per second, the current developed is A) 1 A. B) 10$^{6}$ A. C) 1 .6 X 10$^{-13}$ A. D) 1.6 x 10$^{-19}$A. Show Answer Correct Answer: C) 1 .6 X 10$^{-13}$ A. 57. The study of properties of fluids in motion is called A) Fluids Study. B) Fluids statics. C) Fluids dynamics. D) None. Show Answer Correct Answer: C) Fluids dynamics. 58. What is Ohm's Law and how is it mathematically expressed? A) V = R / I. B) I = V + R. C) R = V-I. D) Ohm's Law is V = I * R. Show Answer Correct Answer: D) Ohm's Law is V = I * R. 59. The terminal potential difference of a battery is less than its emf: A) Under all conditions. B) Only when the battery is being charged. C) Only when the battery is being discharged. D) Only when there is no current in the battery. Show Answer Correct Answer: C) Only when the battery is being discharged. 60. The temperature coefficient ofresistance of a wire is 0.00125 per $^\circ$C.At 20$^\circ$C, its resistance is 1 $\Omega$. Theresistance of the wire will be 2 $\Omega$ at A) 800 $^\circ$C. B) 820 $^\circ$C. C) 700 $^\circ$C. D) 850 $^\circ$C. Show Answer Correct Answer: B) 820 $^\circ$C. ← 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 7Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 8Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books