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 16 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 16 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Static electricity is caused by ..... A) Pressure. B) Dust. C) Friction. D) Trees. Show Answer Correct Answer: C) Friction. 2. On a bar magnet, where is the strongest magnetic force? A) The bar magnet does not have a magnetic field. B) On the top of the bar magnet. C) On the bottom of the bar magnet. D) On the ends of the bar magnet. Show Answer Correct Answer: D) On the ends of the bar magnet. 3. A circuit has 1250 C flowing through it for 25 s. What is the current in the circuit? A) 6250 A. B) 25 A. C) 1250 A. D) 50 A. Show Answer Correct Answer: D) 50 A. 4. Mobile battle is: A) Li-ion and rechargeable. B) Dry cell and rechargeable. C) Lead acid battery and rechargeable. D) All of the above. Show Answer Correct Answer: A) Li-ion and rechargeable. 5. What effect do like (similar) charges have on each other? A) They repel. B) They reverse each other. C) They attract. D) No effect. Show Answer Correct Answer: A) They repel. 6. When two magnetic South poles are brought close to each other, they will A) Attract. B) Cancel each other out. C) Repel. D) Create sparks. Show Answer Correct Answer: C) Repel. 7. What happens when you touch a metal doorknob after rubbing your shoes on the carpet? A) The doorknob sends millions of electrons into your finger. B) Millions of electrons go from your finger into the doorknob. C) The doorknob sends a burst of electric current into your body. D) Our finger becomes negatively charged. Show Answer Correct Answer: B) Millions of electrons go from your finger into the doorknob. 8. The Ni-Cd cell delivers a potential difference of ..... A) 2 V. B) 1.2 V. C) 1.5 V. D) 1 V. Show Answer Correct Answer: B) 1.2 V. 9. A switch that opens a circuit by turning itself off is a ..... A) Motor. B) Electromagnet. C) Circuit breaker. D) Insulator. Show Answer Correct Answer: C) Circuit breaker. 10. What is the potential difference across an electrical load that has a resistance of 4 $\Omega$ and a current of 3 A flowing through it? A) 8V. B) 16V. C) 12V. D) 4V. Show Answer Correct Answer: C) 12V. 11. A(n) is a closed, or complete, path in which an electric current flows. A) Electric current. B) Electric circuit. C) Electric resistance. D) None of the above. Show Answer Correct Answer: B) Electric circuit. 12. Which of the following statements about a series circuit is not correct? A) The current is the same throughout the circuit. B) The voltage is shared across components. C) Different bulbs can be turned on and off depending on where you place a switch. D) When one bulb is broken the circuit will no longer work. Show Answer Correct Answer: C) Different bulbs can be turned on and off depending on where you place a switch. 13. The distance between the focal point and the mirror is A) Focal point. B) Diameter. C) Raduis. D) Focal length. Show Answer Correct Answer: D) Focal length. 14. A 4000-$\Omega$ resistor is connected across a 220-V power source. What current will flow through the resistor? A) 5.5 A. B) 18 A. C) 1.8 A. D) 0.055 A. Show Answer Correct Answer: D) 0.055 A. 15. What causes electrical fires? A) Long circuits. B) Fuses. C) Short circuits. D) Insulators. Show Answer Correct Answer: C) Short circuits. 16. Resistance of carbon filament lamp ..... as the applied voltage increases A) Increases. B) Decreases. C) Remains same. D) None of the above. Show Answer Correct Answer: B) Decreases. 17. Silver is a ..... ? A) Insulator. B) Conductor. C) All the above. D) None of the above. Show Answer Correct Answer: B) Conductor. 18. A flat iron is marked "120 V, 600 W" . In normal use, the current in it is: A) 2 A. B) 7.2 A. C) 5 A. D) 4 A. Show Answer Correct Answer: C) 5 A. 19. Rubber, plastic, paper and glass are all examples of ..... A) Electrical conductors. B) Insulators. C) All the above. D) None of the above. Show Answer Correct Answer: B) Insulators. 20. When a piece of metal becomes positively charged it has:(a) A) Gained protons. B) Gained electrons. C) A. Lost electrons. D) None of the above. Show Answer Correct Answer: C) A. Lost electrons. 21. What does mechanical energy turn to generate power? A) A generator. B) A turbine. C) A solar panel. D) None of the above. Show Answer Correct Answer: B) A turbine. 22. Keeping potential difference constant if resistance is doubled then electric current is A) Reduced to zero. B) Doubled. C) Halved. D) Tripled. Show Answer Correct Answer: C) Halved. 23. Wheat Stone Bridge experiment is most sensitive, when: A) :All four resistances are approximately equal. B) One of the resistances is very high as compare to others. C) One of the resistances is very low as compare to others. D) Any two resistances are equal to infinity. Show Answer Correct Answer: A) :All four resistances are approximately equal. 24. The maximum constant velocity of an object falling vertically downward is called: A) Terminal velocity. B) Instantaneous velocity. C) Average velocity. D) Final velocity. Show Answer Correct Answer: A) Terminal velocity. 25. A student is investigating how changing the size of the core of an electromagnet affects its strength. Which of these is most likely the dependent variable in the student's investigation? A) The number of wire coils wrapped around the core. B) The number of paper clips picked up by the electromagnet. C) The size of the piece of iron used as the core. D) The voltage of the battery used in the circuit. Show Answer Correct Answer: B) The number of paper clips picked up by the electromagnet. 26. As temperature increases, resistance of a metalic conductor ..... A) Increases. B) Decreases. C) Remains same. D) None of the above. Show Answer Correct Answer: B) Decreases. 27. Explain the concept of capacitance and its unit of measurement. A) The farad is a measure of electrical resistance. B) The unit of measurement for capacitance is the farad (F). C) The unit of measurement for capacitance is the volt (V). D) Capacitance is measured in ohms ($\Omega$). Show Answer Correct Answer: B) The unit of measurement for capacitance is the farad (F). 28. A car battery is rated at 80 A h. An ampere-hour is a unit of: A) Current. B) Charge. C) Energy. D) Power. Show Answer Correct Answer: B) Charge. 29. What is 0.0006 written in standard form? A) $6\times10^3$. B) $6\times10^{-3}$. C) $6\times10^{-4}$. D) $6\times10^4$. Show Answer Correct Answer: C) $6\times10^{-4}$. 30. Which of the following procedures will double the force on two point charges? A) Doubling the distance between the charges. B) Doubling the magnitude of one charge. C) Halving the magnitude of one charge. D) Halving the distance between the charges. Show Answer Correct Answer: B) Doubling the magnitude of one charge. 31. Lightning is a form of ..... electricity A) Static. B) Current. C) Aerial. D) None of the above. Show Answer Correct Answer: A) Static. 32. What happens when you rub a balloon on your hair and then place it near a wall? A) The balloon will stick to the wall due to static electricity. B) The balloon will fall to the ground due to gravity. C) The balloon will explode due to pressure. D) The balloon will change color due to chemical reaction. Show Answer Correct Answer: A) The balloon will stick to the wall due to static electricity. 33. Fill in the blank:A ..... object will be attracted to a charged object. A) Negatively Charged. B) Neutral. C) Positively Charged. D) Current. Show Answer Correct Answer: B) Neutral. 34. Current is measured in what units? A) Volts. B) Amperes. C) Watts. D) Ohms. Show Answer Correct Answer: B) Amperes. 35. What is the effect of one negatively charged object and one positively charged object coming close to each other. A) The objects repel each other. B) The objects attract each other. C) All the above. D) None of the above. Show Answer Correct Answer: B) The objects attract each other. 36. What is the purpose of a switch? A) To open and close the circuit. B) To carry the electricity through the circuit. C) To make a fun clicking sound. D) To supply the power to the circuit. Show Answer Correct Answer: A) To open and close the circuit. 37. An electron enters a region of uniform perpendicular E and B fields. It is observed that the velocity v of the electron is unaffected. A possible explanation is: A) Undefined is parallel to $\overrightarrow{E}$. B) $\overrightarrow{v}$ $\overrightarrow{B}$. C) $\overrightarrow{v}$ $\overrightarrow{E}$ $\overrightarrow{B}$. D) Undefined is perpendicular to bothundefinedandundefinedand has magnitude E/B. Show Answer Correct Answer: D) Undefined is perpendicular to bothundefinedandundefinedand has magnitude E/B. 38. A conductor carries a current of 50mA if the area of cross-section of the conductor is 50 mm$^{2 }$then value of the current density in Am$^{-2}$ is A) 3/10. B) 0.5. C) 10$^{-1}$. D) 1. Show Answer Correct Answer: D) 1. 39. What is the direction of electron flow in a circuit? A) In a counterclockwise direction. B) From positive to negative terminal. C) From negative to positive terminal. D) In a clockwise direction. Show Answer Correct Answer: C) From negative to positive terminal. 40. I try to keep electricity from getting to you. A) Conductor. B) Electric discharge. C) Insulator. D) Fuse. Show Answer Correct Answer: C) Insulator. 41. Electrical charge built up on the surface of an object is called ..... A) Lightning. B) Current electricity. C) Static electricity. D) Electrons. Show Answer Correct Answer: C) Static electricity. 42. What happens to the brightness of the light bulbs in a series circuit when you add more lights. A) Each bulb gets brighter. B) Each bulb remains the same. C) Each bulb gets dimmer. D) Half of the bulbs get dimmer. Show Answer Correct Answer: C) Each bulb gets dimmer. 43. A voltmeter coil has resistance 100 $\Omega$ and a resistor of 1.1 k$\Omega$ is connected in series. It can read potential differences up to 24 volts. If this same coil is used to construct an ammeter which can measure currents up to 1.0 A, what should be the approximate resistance of the shunt used? (Note-1.1 k $\Omega$ resistance not to be used in the construction of the Ammeter) A) 1 $\Omega$. B) 0.5 $\Omega$. C) 2 $\Omega$. D) 4 $\Omega$. Show Answer Correct Answer: C) 2 $\Omega$. 44. N capacitors each of capacitance C are connected in series the effective capacitance is A) N/C. B) C/n. C) NC. D) None of the above. Show Answer Correct Answer: B) C/n. 45. Very small current flows when lightning occurs A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 46. What happens when two items of positive charges comes together? A) They explode. B) They repel. C) They fall. D) They attract. Show Answer Correct Answer: B) They repel. 47. Two 110-V light bulbs, one "25 W" and the other "100 W" , are connected in series to a 110 V source. Then: A) The current in the 100-W bulb is greater than that in the 25-W bulb. B) The current in the 100-W bulb is less than that in the 25-W bulb. C) Both bulbs will light with equal brightness. D) None of the above. Show Answer Correct Answer: D) None of the above. 48. Electric current has both magnitude and direction. It is a A) Vector quantity. B) Scalar quantity. C) Tensor quantity. D) None of these. Show Answer Correct Answer: B) Scalar quantity. 49. One type of energy can be converted into another. Electrical energy is converted into mechanical energy when a fan is plugged into a power source and turned on. If the fan and power source are not connected to anything else, the amount of electrical energy is the same as the amount of mechanical energy. What is this rule known as? A) Conservation of energy. B) Conversion of energy. C) Transference of energy. D) Adaptation of energy. Show Answer Correct Answer: A) Conservation of energy. 50. Electric current passes through a circuit produces A) Chemical effect. B) Magnetic effect. C) Thermoelectric effect. D) All the above. Show Answer Correct Answer: D) All the above. 51. Surface tension is due to A) Gravitational force. B) Frictional force between molecules. C) Adhesive force between molecules. D) Cohesive force between molecules. Show Answer Correct Answer: D) Cohesive force between molecules. 52. Current Electricity and Magnetism A) A device that converts electrical energy into mechanical energy. B) A device that stores electrical energy in an electric field. C) A device that measures the current in a circuit. D) A device that converts mechanical energy into electrical energy. Show Answer Correct Answer: A) A device that converts electrical energy into mechanical energy. 53. We use alloy for making of resistors, because they have A) Low High. B) High LOW. C) High High. D) Temp. coefficient Resistivity(a) Low low. Show Answer Correct Answer: D) Temp. coefficient Resistivity(a) Low low. 54. Provides power to a circuit A) Bulb holder. B) Light bulb. C) Source. D) Wire. Show Answer Correct Answer: C) Source. 55. A wire of 9 ohm resistance is broken in two parts. The length ratio being 1:2. The two pieces are connected in parallel. The net resistance will be A) 4 ohm. B) 6 ohm. C) 3 ohm. D) 2 ohm. Show Answer Correct Answer: D) 2 ohm. 56. If two objects with static charge are attracted, what do you know about them? A) They are both positively charged. B) They are both negatively charged. C) One is positively charged and one is negatively charged, but you won't be able to tell which is which. D) One is positively charged and one is negatively charged, and you can tell which is which by looking at them. Show Answer Correct Answer: C) One is positively charged and one is negatively charged, but you won't be able to tell which is which. 57. The movement of electrons along a path A) Current. B) Switch. C) Circuit. D) Charge. Show Answer Correct Answer: A) Current. 58. The ..... has lowest resistivity. A) Conductor. B) Insulator. C) Semiconductor. D) All the obove. Show Answer Correct Answer: A) Conductor. 59. Which of the following represents the largest form of how electrical energy was generated in Ontario in 2007? A) Hydro. B) Natural Gas. C) Coal. D) Nuclear. Show Answer Correct Answer: D) Nuclear. 60. What is the continuous movement of electrons called? A) Friction. B) Power. C) Static electricity. D) Current electricity. Show Answer Correct Answer: D) Current electricity. ← 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