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 17 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 17 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A certain wire has a resistance R . The resistance of another wire identical with the first except having twice its diameter is A) 0.25 R. B) 0.5 R. C) 4 R. D) 2 R. Show Answer Correct Answer: A) 0.25 R. 2. A flaw in the circuit that allows a large current to flow through where it isn't wanted. A) Full circuit. B) Short circuit. C) Sideways circuit. D) Tall circuit. Show Answer Correct Answer: B) Short circuit. 3. The tungsten filament of two electric bulbs are of the same length. If one of them gives 25 W power and the other 60 W power, then A) Both the filaments are of same thickness. B) 25 W bulb has thicker filament. C) 60 W bulb has thicker filament. D) Both the filaments have same area of cross-section. Show Answer Correct Answer: C) 60 W bulb has thicker filament. 4. If a 2 $\Omega$ resistor is connected to 12 V, what is the current through the resistor? (I=V/R) ***You will need to show the work for this problem on paper*** A) 3 A. B) 5 A. C) 6 A. D) 4 A. Show Answer Correct Answer: C) 6 A. 5. ..... magnets have a North pole and a South pole. A) No. B) Some. C) All. D) Broken. Show Answer Correct Answer: C) All. 6. How much energy is dissipated by a resistor with a potential difference of 9.0V, current of 0.23A, and time of 331 seconds? A) 93.2 J. B) 45.9 J. C) 20.7 J. D) 68.7 J. Show Answer Correct Answer: B) 45.9 J. 7. Which material is a conductor? A) Metal. B) Plastic. C) Rubber. D) None of the above. Show Answer Correct Answer: A) Metal. 8. In the potentiometer the balanced point obtained when A) Emf of battery cell becomes equal to experimental cell(primary cell). B) The potential difference across the potentiometer wire becomes equal to emf of the battery. C) Potential difference of the wire between the +ve end of the cell to jockey becomes equal to emf of the battery. D) Potential difference between the +ve end of the battery to jockey becomes equal to experimental cell(primary cell). Show Answer Correct Answer: D) Potential difference between the +ve end of the battery to jockey becomes equal to experimental cell(primary cell). 9. The path from the battery through the wire and light bulb and back to the battery is an INCOMPLETE or OPEN circuit. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 10. Charges flow through a circuit due to differences in ..... A) Insulation. B) Potential energy. C) Resistance. D) Conductivity. Show Answer Correct Answer: B) Potential energy. 11. As the number of resistors increase in a series circuit, the total resistance ..... and the total current ..... A) Decrease, increase. B) Increase, decrease. C) Increase, increase. D) Decrease, decrease. Show Answer Correct Answer: B) Increase, decrease. 12. In a large building, there are 15 bulbs of 40 W, 5 bulbs of 100 W, 5 fans of 80 W and 1 heater of 1 kW are connected . The voltage of electric mains is 220 V. The minimum capacity of the main fuse of the building will be A) 8A. B) 14 A. C) 12A. D) 10A. Show Answer Correct Answer: C) 12A. 13. Two resistors 6 ohm and 9 ohm are connected in series to a 120 volt source. The power consumed by 6 ohm resistor is A) 1800 W. B) 1500 W. C) 384 W. D) 616 W. Show Answer Correct Answer: C) 384 W. 14. The plastic around the wire is A) Conductor. B) Insulator. C) Decoration. D) None of the above. Show Answer Correct Answer: B) Insulator. 15. What is the source of A.C.? A) Dry Cell. B) Li Fe Cell. C) Mains. D) Simple voltaic cell. Show Answer Correct Answer: C) Mains. 16. Why are parallel circuits more useful in more applications than series circuits? (3b; A) Parallel circuits are cheaper to build. B) Parallel circuits take up less room. C) Series circuits produce short circuits, but parallel circuits don't. D) They allow many appliances to be used at one time. Show Answer Correct Answer: D) They allow many appliances to be used at one time. 17. This is related to the force that causes electric charges to flow A) Resistance. B) Voltage. C) Current. D) Circuit. Show Answer Correct Answer: B) Voltage. 18. What is an example of an electric receiver? A) Motor. B) D cell. C) Wires. D) Switch. Show Answer Correct Answer: A) Motor. 19. Current flowing through a wire is surrounded by a/an A) Force field. B) Magnetic force. C) Nothing. D) None of the above. Show Answer Correct Answer: B) Magnetic force. 20. An object becomes negatively charged by A) Losing electrons. B) Gaining electrons. C) Losing protons. D) Gaining protons. Show Answer Correct Answer: B) Gaining electrons. 21. What is the flow of charge known as? A) Voltage. B) Power. C) Current. D) Resistance. Show Answer Correct Answer: C) Current. 22. How should an ammeter be connected in a circuit? A) In parallel. B) In series. C) It does not matter. D) Directly to the power source. Show Answer Correct Answer: B) In series. 23. In a series circuit, if one light goes out, what happens? A) All lights will go out. B) The other lights will stay on. C) All the above. D) None of the above. Show Answer Correct Answer: A) All lights will go out. 24. State Kirchhoff's First Law and provide an example. A) The total current in a circuit is always zero regardless of junctions. B) The total voltage entering a junction equals the total voltage leaving it. C) Kirchhoff's First Law states that the total current entering a junction equals the total current leaving it. D) The total resistance at a junction is equal to the sum of individual resistances. Show Answer Correct Answer: C) Kirchhoff's First Law states that the total current entering a junction equals the total current leaving it. 25. If a wire is stretched to four times its length, then the specific resistance of the wire will be A) Become 16 times. B) Become 1/4 times. C) Becomes four times. D) Remain the same. Show Answer Correct Answer: D) Remain the same. 26. An electron has a change of A) 1.6 x 10 19 A. B) 1.6 x 10 19 C. C) 1.6 x 10-19 C. D) 1.6 x 10-19 A. Show Answer Correct Answer: C) 1.6 x 10-19 C. 27. The inverse of the effective resistance is equal to the sum of the inverses of individual resistances. A) Series. B) Parallel. C) All the above. D) None of the above. Show Answer Correct Answer: B) Parallel. 28. In a typical battery ..... A) Voltage determines which end of the battery has more electrical potential energy. B) The electrical potential energy does not affect the flow of current. C) The negative end has the same amount of electrical potential energy as the positive end. D) The positive end has more electrical potential energy than the negative end. Show Answer Correct Answer: D) The positive end has more electrical potential energy than the negative end. 29. How are a bar magnet and Earth similar? A) They both are made of iron. B) They both produce a magnetic field. C) They both produce an electric current. D) They both rotate on an axis. Show Answer Correct Answer: B) They both produce a magnetic field. 30. What is Kirrhoff's Loop Rule? A) Looooooooooops. B) The voltage of battery equal the voltage of the bulb. C) More current = more voltage/potential. D) Batteries are always higher in voltage. Show Answer Correct Answer: B) The voltage of battery equal the voltage of the bulb. 31. Select the electrical component used to measure voltage. A) Vaultmeter. B) Ammeter. C) Ampmeter. D) Voltmeter. Show Answer Correct Answer: D) Voltmeter. 32. Also known as 'electric potential difference', what quantity describes electrical potential energy per coulomb of charge in a circuit? A) Electric Resistance. B) Electrical Power. C) Electric Current. D) Voltage. Show Answer Correct Answer: D) Voltage. 33. Three resistors each of 2 ohm are connected together in a triangle shape. The resistance between any two vertices will be A) 3/4 ohm. B) 4/3 ohm. C) 6 ohm. D) 3 ohm. Show Answer Correct Answer: B) 4/3 ohm. 34. Four 20-$\Omega$ resistors are connected in series and the combination is connected to a 20-V emf device. The current in any one of the resistors is:. A) 5.0 A. B) 0.25 A. C) 4.0 A. D) 1.0 A. Show Answer Correct Answer: B) 0.25 A. 35. (a) is the flow of an electric charge through a conductor A) Conductors. B) Magnetism. C) A. Electrical Current. D) Static Electricity. Show Answer Correct Answer: C) A. Electrical Current. 36. An example of a parallel circuit is A) The wiring in a house. B) A flashlight. C) A single circular path. D) None of the above. Show Answer Correct Answer: A) The wiring in a house. 37. To prevent overload and overheating of wires A) Fuses are used. B) Circuit breakers are used. C) Fuses and circuit breakers are used. D) Fuses and resistor are used. Show Answer Correct Answer: C) Fuses and circuit breakers are used. 38. Protons are negatively charged A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 39. An image that is formed at the back of the mirror is said to be A) Magnified image. B) Inverted image. C) Virtual image. D) Real image. Show Answer Correct Answer: C) Virtual image. 40. A cell of internal resistance 3 ohm and emf 10 volt is connected to a uniform wire of length 500 cm and resistance 3 ohm. The potential gradient in the wire is A) 10 mV/cm. B) 4 mV/cm. C) 30 mV/cm. D) 20 mV/cm. Show Answer Correct Answer: A) 10 mV/cm. 41. Why a voltmeter is connected in parallel with the device across which the voltage is being determined? A) Because of high resistance. B) Because the voltage is higher than current. C) Because it can't measure voltage in series. D) None of the above. Show Answer Correct Answer: A) Because of high resistance. 42. Usually a sudden burst of electricty A) Static Electricity. B) Current Electricity. C) All the above. D) None of the above. Show Answer Correct Answer: A) Static Electricity. 43. The steady flow of electrons between objects A) Static electricity. B) Battery. C) Source. D) Current electricity. Show Answer Correct Answer: D) Current electricity. 44. Electric currents are used to do work such as to produce light and heat or to cause motion like in a motor. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 45. If current flow in a bulb is 1.5A. What is the charge flow in 5 minutes? A) 4.5x10exp-2 A. B) 2.4x10exp-2 A. C) 2.4x10exp-2 C. D) 4.5x10exp-2 C. Show Answer Correct Answer: D) 4.5x10exp-2 C. 46. A resistor's first three color bands are brown, black, and red. What is its value? A) 1000 ohms. B) 10K ohms. C) 200 ohms. D) 10 ohms. Show Answer Correct Answer: A) 1000 ohms. 47. When a wire stretched uniformaly and its length increased to double its value, then its resistance A) Decreased to quarter. B) Decreased to half. C) Increased double. D) Increased 4 times. Show Answer Correct Answer: D) Increased 4 times. 48. In a meter bridge experiment, when the resistances in the gaps are interchanged the balance point is shifted by 10cm. The ratio of the resistance is: ..... A) 12:8. B) 15:5. C) 10:9. D) 11:9. Show Answer Correct Answer: D) 11:9. 49. Does this statement best describe a parallel or a series circuit. Different currents flow through each resistor. A) Parallel circuit. B) Series circuit. C) All the above. D) None of the above. Show Answer Correct Answer: A) Parallel circuit. 50. S.I unit of P.D is A) $\Omega$. B) J. C) Ampere (A). D) Volt (V). Show Answer Correct Answer: D) Volt (V). 51. What instrument is used to measure the electric current that flows through a wire? A) Voltmeter. B) Ammeter. C) Electric meter. D) Galvanometer. Show Answer Correct Answer: B) Ammeter. 52. The rate of flow of electrons in a conductor is referred to as ..... A) Conduction electrons. B) Electric current. C) Battery voltage. D) Series circuit. Show Answer Correct Answer: B) Electric current. 53. This force is the attractive and repulsive force between two poles. A) Electric. B) Magnetic. C) Electromagnetic. D) None of the above. Show Answer Correct Answer: B) Magnetic. 54. Insulator or Conductor?STYROFOAM A) Insulator. B) Conductor. C) All the above. D) None of the above. Show Answer Correct Answer: A) Insulator. 55. How does a voltmeter meter is added in the circuit? A) Series. B) Parallel. C) All the above. D) None of the above. Show Answer Correct Answer: B) Parallel. 56. What type of electricity caused by a steady flow of electrons? A) Amazing. B) Static. C) Ground. D) Current. Show Answer Correct Answer: D) Current. 57. What is a property of matter that causes objects to attract or repel each other? A) Electric circuit. B) Electric field. C) Electric charge. D) Compass. Show Answer Correct Answer: C) Electric charge. 58. Opposite charges are attracted to one another. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 59. What is the main characteristic of current electricity? A) A steady flow of electrons along a circuit. B) A random movement of protons. C) A stationary charge. D) None of the above. Show Answer Correct Answer: A) A steady flow of electrons along a circuit. 60. Static electricity is a form of energy when the charges are the rest. A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: A) TRUE. ← 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