This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Physics (Part I) Chapter 3 Current Electricity – Quiz 25 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 25 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The maximum power is delivered from a source to its load when the load resistance is greater than the source resistance. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 2. The magnitude of electric field intensity E is such that, an electron placed in it would experience an electrical force equal to its A) Mge. B) Mg/e. C) E/mg. D) E$^{2}$g/m$^{2}$. Show Answer Correct Answer: B) Mg/e. 3. A rigid body is rotating about an axis. to stop the rotation, we have to apply ..... A) Pressure. B) Force. C) Momentum. D) Torque. Show Answer Correct Answer: D) Torque. 4. In case of four wires of same material, the resistance will be minimum when its length and diameter are respectively: A) L and D. B) 2L and D. C) (L/2) and 2D. D) 2L and (D/2). Show Answer Correct Answer: C) (L/2) and 2D. 5. Plastic is a good electrical conductor. A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: B) FALSE. 6. A cylindrical copper rod has resistance R. It is reformed to twice its original length with no change of volume. Its new resistance is: A) R. B) 2R. C) 4R. D) 8R. Show Answer Correct Answer: C) 4R. 7. What is the primary function of a battery in a circuit? A) To provide a path for the current. B) To store electrical energy. C) To convert electrical energy into light. D) To resist the flow of current. Show Answer Correct Answer: B) To store electrical energy. 8. If resistance is increased, current will ..... A) Increase. B) Decrease. C) Stay the same. D) None of the above. Show Answer Correct Answer: B) Decrease. 9. Which material is commonly used as an insulator in electrical circuits? A) Copper. B) Aluminum. C) Rubber. D) Iron. Show Answer Correct Answer: C) Rubber. 10. According to Ohm's Law, if you were to triple the voltage of a circuit without changing the resistance, what would happen to the flow of current? A) It would stay the same. B) It would increase by 2x. C) It would increase by 3x. D) It would decrease by 3x. Show Answer Correct Answer: C) It would increase by 3x. 11. Does this statement best describe a parallel or a series circuit. When more light bulbs are added they all remain bright. A) Parallel circuit. B) Series circuit. C) All the above. D) None of the above. Show Answer Correct Answer: A) Parallel circuit. 12. If the distance doubles, what happens to the force? A) Reduced by half. B) Reduced by 1/4. C) Stays the same. D) Quadruples. Show Answer Correct Answer: B) Reduced by 1/4. 13. Wood is a ..... ? A) Conductor. B) Insulator. C) All the above. D) None of the above. Show Answer Correct Answer: B) Insulator. 14. A Carbon Resistor is marked in colour bands of Red, Black, Orange, Silver.What is the resistance and tolerance value of the resistor? A) 20 kilo ohm & +-10%. B) 18 kilo ohm & +-5%. C) 25 kilo ohm & +-10%. D) 20 kilo ohm. Show Answer Correct Answer: A) 20 kilo ohm & +-10%. 15. ..... is used to measure the magnitude of current flowing in a circuit. A) Galvanometer. B) Ammeter. C) Voltmeter. D) Load. Show Answer Correct Answer: A) Galvanometer. 16. How are a copper wire and aluminum foil alike? A) Negative charges move through them easily,. B) They are both silver colored metals. C) They are both used to insulate wires. D) Negative charges can't move through them. Show Answer Correct Answer: A) Negative charges move through them easily,. 17. Atoms have a nucleus made of protons and electrons. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 18. By what percent the specific resistance of a conductor change when it is length is increased by two times. A) 10%. B) 20%. C) 5%. D) No change. Show Answer Correct Answer: D) No change. 19. What happends to current if voltage increased? A) Stops working. B) Current increases. C) Current descreases. D) None of the above. Show Answer Correct Answer: B) Current increases. 20. Objects affected by this form of electricity do not have to be touching A) Static Electricity. B) Current Electricity. C) All the above. D) None of the above. Show Answer Correct Answer: A) Static Electricity. 21. 1 KV = ..... V A) $10^{-3}$. B) $10^{-6}$. C) $10^3$. D) None of the above. Show Answer Correct Answer: C) $10^3$. 22. Which one uses less wire? A) Parallel circuit. B) Series Circuit. C) All the above. D) None of the above. Show Answer Correct Answer: B) Series Circuit. 23. Which of these is not another name for voltage? A) Electromotive force. B) Potential difference. C) Flow of charge. D) None of the above. Show Answer Correct Answer: C) Flow of charge. 24. Current that does NOT reverse direction is called ..... A) Magnetic current. B) Direct current. C) Circuit current. D) Alternating current. Show Answer Correct Answer: B) Direct current. 25. Your fuse at home has "blown" up many times. Which of the following will you do to solve this problem and prevent it from happening again? A) Connect appliances in series instead of parallel. B) Do not use too many appliances at the same time. C) Plug two or three appliances in one outlet. D) Connect an additional fuse to your circuit. Show Answer Correct Answer: B) Do not use too many appliances at the same time. ← 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