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 12 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 12 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What voltage is needed to produce 2A of current through a 10$\Omega$ resistor? A) 20V. B) 0.2V. C) 5V. D) 2V. Show Answer Correct Answer: A) 20V. 2. Rubbing a balloon on hair is an example of static charge build up created by ..... A) Conduction. B) Hairduction. C) Induction. D) Friction. Show Answer Correct Answer: D) Friction. 3. Fill in the Blank:An Example of an Electrical Discharge in Nature is ..... A) Rain. B) Lightning. C) Seasons Changing. D) Thunder. Show Answer Correct Answer: B) Lightning. 4. What quantity describes the rate of flow of charges or the total amount of charges moving past a point in a conductor? A) Electric Current. B) Electrical Power. C) Voltage. D) Electric Resistance. Show Answer Correct Answer: A) Electric Current. 5. Which statement is true about an electromagnet? A) Increasing the number of coils decreases the strength. B) It is made by wrapping current carrying wire around an iron core. C) It is a permanent magnet. D) It cannot be turned off. Show Answer Correct Answer: B) It is made by wrapping current carrying wire around an iron core. 6. The symbol for resistance is ..... A) A. B) $\theta$. C) $\Omega$. D) V. Show Answer Correct Answer: C) $\Omega$. 7. Nine identical wires, each of diameter d and length L, are connected in parallel. The combination has the same resistance as a single similar wire of length L but whose diameter is: A) D/3. B) 9d. C) 3d. D) D/9. Show Answer Correct Answer: C) 3d. 8. The electric potential of earth is taken to be zero beacause earth is a good A) Insulator. B) Conductor. C) Dielectric. D) Semiconductor. Show Answer Correct Answer: B) Conductor. 9. An electromagnet is a solenoid with an ..... core. A) Copper. B) Wire. C) Iron. D) None of the above. Show Answer Correct Answer: C) Iron. 10. In India electricity is supplied fordomestic use at 220 V. It is supplied at110 V in USA. If the resistance of a 60Wbulb for use in India is R, the resistanceof a 60W bulb for use in USA will be A) 2R. B) R. C) R/4. D) R/2. Show Answer Correct Answer: C) R/4. 11. What is the unit of measurement for resistance? A) Ampere. B) Watts. C) Voltage. D) Ohms. Show Answer Correct Answer: D) Ohms. 12. Which circuit is pictured below? A) Series circuit. B) Open circuit. C) Parallel circuit. D) Solar circuit. Show Answer Correct Answer: C) Parallel circuit. 13. When unequal resistors are connected in parallel in a circuit, A) The power generated in each resistor is the same. B) The potential drop is always the same across each resistor. C) The same current always runs through each resistor. D) The largest resistance has the largest current through it. Show Answer Correct Answer: B) The potential drop is always the same across each resistor. 14. How does a switch control the flow of electricity? A) A switch can open or close a circuit. B) A switch can make electrons positively charged. C) A switch can convert electricity into heat. D) A switch can make electrons neutral. Show Answer Correct Answer: A) A switch can open or close a circuit. 15. A resistance of wire at 20$^{0}$C is 20 ohm and at 500$^{0}$ C is 60 ohm. At what temperature its resistance will be 25 ohm? A) 60$^{0}$ C. B) 50$^{0 }$C. C) 70$^{0}$ C. D) 80$^{0}$ C. Show Answer Correct Answer: D) 80$^{0}$ C. 16. As per Ohm's law, V = ..... X ..... A) V, I. B) Q, R. C) I, R. D) Q, I. Show Answer Correct Answer: C) I, R. 17. Describe the factors that affect the resistivity of a material. A) Magnetic field strength. B) Temperature, material composition, impurities, and structural properties. C) Voltage and current levels. D) Surface area and color. Show Answer Correct Answer: B) Temperature, material composition, impurities, and structural properties. 18. Which quantity describes the measure of the rate of delivery of electrical energy, or the rate of work done by an electrical component? A) Voltage. B) Electric Resistance. C) Electric Current. D) Electrical Power. Show Answer Correct Answer: D) Electrical Power. 19. What particles of an atom are attracted to each other? A) Protons and Electrons. B) Electrons and Electrons. C) Protons and Protons. D) Electrons and Neutrons. Show Answer Correct Answer: A) Protons and Electrons. 20. SI unit of resistance is ..... A) Ampere. B) Coulomb. C) Volt. D) Ohm. Show Answer Correct Answer: D) Ohm. 21. This unit tells you how much electricity is passing a point per second. A) Ohms ($\Omega$). B) Volts (V). C) Amperes (A). D) Joules (J). Show Answer Correct Answer: C) Amperes (A). 22. A potentiometer wire is 100 cm long a constant potential difference is maintained across it. At first, two cells are connected in series to support one another and then in opposite direction. The balance points are obtained at 50 cm and 10 cm from the positive end of the wire in the two cases. The ratio of emfs is ..... A) 5:4. B) 5:1. C) 3:2. D) 3:4. Show Answer Correct Answer: C) 3:2. 23. The SI unit of electric charge is the ..... A) Ampere. B) Volt. C) Meter. D) Coulomb. Show Answer Correct Answer: D) Coulomb. 24. Effective capacitance of two capacitors having equal capacitance when connected in series is 12 pF. Find the capacitance of each capacitor A) 6 pF. B) 3 pF. C) 24 pF. D) None of the above. Show Answer Correct Answer: C) 24 pF. 25. What does an iron nail wrapped with copper wire and attached to a battery make? A) Metal magnet. B) Permanent magnet. C) Compass. D) Electromagent. Show Answer Correct Answer: D) Electromagent. 26. In series circuit, the lights are connected ..... to each other. A) Side by side. B) Parallel. C) Close by. D) Effectively. Show Answer Correct Answer: A) Side by side. 27. Made up of parts that work together to allow electricity to flow A) Resistor. B) Terminal. C) Cell. D) Circuit. Show Answer Correct Answer: D) Circuit. 28. Requires a source and special equipment to generate it A) Static Electricity. B) Current Electricity. C) All the above. D) None of the above. Show Answer Correct Answer: B) Current Electricity. 29. Working principle of Potentiometer is ..... A) Ohm's law. B) Wheatstone's principle. C) Emf $\propto$. D) None of the above. Show Answer Correct Answer: C) Emf $\propto$. 30. To decrease the amount of products purchased or produced with the intent of minimizing waste A) REDUCE. B) POLLUTION. C) RECYCLE. D) CONSUMER. Show Answer Correct Answer: A) REDUCE. 31. A negatively charged object will ..... a neutrally charged object. A) Repel. B) Atrract. C) Discharge electrons. D) Will high five. Show Answer Correct Answer: B) Atrract. 32. On which side of the circuits has the strongest voltage A) The wires nearest to the bulbs. B) The negative side. C) The positive side. D) The battery. Show Answer Correct Answer: C) The positive side. 33. One meter long metallic wire is broken into two unequal parts P and Q. The part P is uniformly extended into another wire R. Length of R is twice the length of P and the resistance of R is equal to that of Q. The ratio of resistances of P and R is ..... A) 1:4. B) 1:2. C) 3:2. D) None of these. Show Answer Correct Answer: A) 1:4. 34. How is electrical pressure measured? A) Amps. B) Ohm. C) Volts. D) Watts. Show Answer Correct Answer: C) Volts. 35. Anode is the ..... electrode of a battery A) Positive. B) Negative. C) All the above. D) None of the above. Show Answer Correct Answer: B) Negative. 36. In a series circuit, how does the total resistance compare to individual resistances? A) The total resistance is equal to the sum of individual resistances. B) The total resistance is greater than the individual resistances. C) The total resistance is the same as the largest individual resistance. D) The total resistance is less than the smallest individual resistance. Show Answer Correct Answer: B) The total resistance is greater than the individual resistances. 37. In a parallel circuit, how is current distributed? A) It remains constant in all branches. B) It is divided based on resistance. C) It flows only through the path of least resistance. D) It is shared between the different branches. Show Answer Correct Answer: D) It is shared between the different branches. 38. Which of the following components is essential for a simple electric circuit to function? A) Capacitor. B) Battery. C) Resistor. D) Transistor. Show Answer Correct Answer: B) Battery. 39. What does Kirchhoff's second law show? A) Conservation of charge. B) Conservation of energy. C) In any closed loop, the sum of the e.m.f. is equal to the sum of the products of the current and the resistance (potential difference). D) The sum of the current entering a junction is the sum of the current leaving the junction. Show Answer Correct Answer: C) In any closed loop, the sum of the e.m.f. is equal to the sum of the products of the current and the resistance (potential difference). 40. Materials that cut down or resist the flow of charges are called? A) Conductors. B) Resistors. C) Insulators. D) Circuts. Show Answer Correct Answer: B) Resistors. 41. Which of the following is a real-world application of static electricity? A) Powering a car engine. B) Photocopier function. C) Operating a computer. D) Lighting a bulb. Show Answer Correct Answer: B) Photocopier function. 42. What two conditions are necessary for the flow of current? A) Resistance and Capacitance. B) Inductance and Resistance. C) Voltage and a Complete Circuit. D) Voltage and an Open Circuit. Show Answer Correct Answer: C) Voltage and a Complete Circuit. 43. A material with negative temperature coefficient of resistance is called A) Metal. B) Alloy. C) Thermistor. D) Thermometer. Show Answer Correct Answer: C) Thermistor. 44. Where would you place an ammeter in a series circuit to get a reading? A) Next to the cell only. B) In parallel with the component. C) In parallel with the cell. D) Anywhere in the circuit. Show Answer Correct Answer: D) Anywhere in the circuit. 45. Name one D.C source. A) A.C generator. B) Ni-Fe accumulator. C) Cell. D) Lead accumulator. Show Answer Correct Answer: C) Cell. 46. Which of the following is NOT a hazard with electricity. A) Static shocks from getting back in your car when filling your gas. B) Using your cellphone while adding gas to your car. C) Fixing a toaster while it is still plugged in. D) Having a shower during a thunder storm. Show Answer Correct Answer: B) Using your cellphone while adding gas to your car. 47. In Direct Current (DC), how do electric charges move? A) In one direction. B) In a circular motion. C) In random directions. D) In alternating directions. Show Answer Correct Answer: A) In one direction. 48. An electromagnet's poles may be reversed by: A) Altering the material used to make the coils. B) Increasing the number of coils. C) Decreasing the voltage of the coil. D) Changing the direction of current flow. Show Answer Correct Answer: D) Changing the direction of current flow. 49. A circuit with gaps is called a(n) ..... circuit. A) Open. B) Closed. C) Series. D) Parallel. Show Answer Correct Answer: A) Open. 50. A solution of NaCl discharges 6.1 x 10$^{16}$ Na$^{+}$ ions and 4.6 x 10$^{16}$ Cl$^{-}$ ions in 2 seconds. Find the current passing through the solution A) 2.56 x 10$^{-3 }$A. B) 8.56 x 10$^{-3 }$A. C) 1.56 x 10$^{-3 }$A. D) 3.56 x 10$^{-3 }$A. Show Answer Correct Answer: B) 8.56 x 10$^{-3 }$A. 51. Current carriers in Electrolyte are/is A) Free electrons. B) Holes. C) Electrons and holes both. D) Positive and negative ions. Show Answer Correct Answer: D) Positive and negative ions. 52. If a current of 3 A flows through a resistor connected to 90 V, what is the resistance? (R=V/I) ***You will need to show the work for this problem on paper*** A) 20 $\Omega$. B) 90 $\Omega$. C) 30 $\Omega$. D) 3 $\Omega$. Show Answer Correct Answer: C) 30 $\Omega$. 53. What is electricity? A) The energy stored in the bonds of chemical compounds. B) The energy produced by electrons. C) The energy produced when an object vibrates. D) The energy of motion. Show Answer Correct Answer: B) The energy produced by electrons. 54. A flow of electric charges A) Energy. B) Electric current. C) Motor. D) Filament. Show Answer Correct Answer: B) Electric current. 55. Analysis of a circuit produces two loop equations:10x + 30y = 7 and 40x-20y = 0What are the currents x and y? A) X = 50 and y = 10. B) X = 0.2 and y = 0.1. C) X = 0.01 and y = 0.02. D) Y = 0.2 and x = 0.1. Show Answer Correct Answer: D) Y = 0.2 and x = 0.1. 56. According to Ohm's Law, what is the relationship between current and potential difference? A) Directly Proportional. B) Exponential Relationship. C) Inversely Proportional. D) No Relationship. Show Answer Correct Answer: A) Directly Proportional. 57. The voltage across a cooker is 230 V. There is a current of 12 A for 10 minutes. Calculate the total amount of energy. A) 2 kJ. B) 1.7 MJ. C) 1.7 kJ. D) 28 kJ. Show Answer Correct Answer: B) 1.7 MJ. 58. The drift speed of electron in copper wire of diameter d and length l is v. If the potential difference across the wire is doubled, then the new drift velocity will be A) V. B) V/2. C) 3v. D) 2v. Show Answer Correct Answer: D) 2v. 59. In liquids, movement of ..... and ..... cause electric current. A) Electron, proton. B) Electron, neutrons. C) Positive and negative ions. D) None of the above. Show Answer Correct Answer: C) Positive and negative ions. 60. Potentiometer measures potential difference more accurately than a voltmeter because A) It has a high wire of resistance. B) It does not draw current from external circuit. C) It draws heavy current from external circuit. D) It has a wire of low resistance. Show Answer Correct Answer: B) It does not draw current from external circuit. ← 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