This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Physics (Part I) Chapter 3 Current Electricity – Quiz 28 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 28 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Current is given as A) Q = I/E. B) I = Q/E. C) V = W/q. D) I = R/V. Show Answer Correct Answer: B) I = Q/E. 2. 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. 3. When a magnet is able to move freely, its North pole will A) Spin wildly. B) Point to the Earth's South pole. C) Point to the Earth's geographic North pole. D) Point to the Earth's magnetic North pole. Show Answer Correct Answer: D) Point to the Earth's magnetic North pole. 4. 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. 5. 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. 6. 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. 7. What does the Greek letter $\Omega$ (Omega) represent? A) Amps. B) Volts. C) Watts. D) Ohms. Show Answer Correct Answer: D) Ohms. 8. 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. 9. You have a flashlight with a 1.5V battery and an incandescent lamp that draws 0.2A. What is the filament resistance? A) 3 ohms. B) 75 ohms. C) 7.5 ohms. D) .133 ohms. Show Answer Correct Answer: C) 7.5 ohms. 10. In a simple circuit, what happens to the current if the resistance is doubled while the voltage remains constant? A) The current doubles. B) The current is halved. C) The current remains the same. D) The current becomes zero. Show Answer Correct Answer: B) The current is halved. 11. 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= E/R+r/n. C) I= E/ R + nr. D) I= nE/ nR + r. Show Answer Correct Answer: A) I= nE/ R + nr. 12. 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. 13. 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. 14. 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) Continue working. C) Short circuit. D) Turn off. Show Answer Correct Answer: B) Continue working. 15. 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. 16. Rubbing a balloon on hair is an example of static charge build up created by ..... A) Conduction. B) Friction. C) Induction. D) Hairduction. Show Answer Correct Answer: B) Friction. 17. Fill in the Blank:An Example of an Electrical Discharge in Nature is ..... A) Thunder. B) Lightning. C) Rain. D) Seasons Changing. Show Answer Correct Answer: B) Lightning. 18. What quantity describes the rate of flow of charges or the total amount of charges moving past a point in a conductor? A) Voltage. B) Electric Current. C) Electric Resistance. D) Electrical Power. Show Answer Correct Answer: B) Electric Current. 19. Which statement is true about an electromagnet? A) It is a permanent magnet. B) Increasing the number of coils decreases the strength. C) It cannot be turned off. D) It is made by wrapping current carrying wire around an iron core. Show Answer Correct Answer: D) It is made by wrapping current carrying wire around an iron core. 20. The symbol for resistance is ..... A) $\Omega$. B) $\theta$. C) A. D) V. Show Answer Correct Answer: A) $\Omega$. 21. 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) 9d. B) 3d. C) D/3. D) D/9. Show Answer Correct Answer: B) 3d. 22. The electric potential of earth is taken to be zero beacause earth is a good A) Insulator. B) Conductor. C) Semiconductor. D) Dielectric. Show Answer Correct Answer: B) Conductor. 23. 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. 24. 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) R. B) 2R. C) R/4. D) R/2. Show Answer Correct Answer: C) R/4. 25. What is the unit of measurement for resistance? A) Voltage. B) Ampere. C) Watts. D) Ohms. Show Answer Correct Answer: D) Ohms. ← PreviousNext →Related 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 8Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 9Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books