This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Physics (Part I) Chapter 3 Current Electricity – Quiz 51 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 51 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Electric currents passing through wires will produce a(n) A) Solenoid. B) Magnet. C) Magnetic field. D) Insulator. Show Answer Correct Answer: C) Magnetic field. 2. Relation connecting resistance and resistivity is ..... A) $\rho$. B) $\rho$. C) $\rho$. D) None of the above. Show Answer Correct Answer: A) $\rho$. 3. A constant voltage is applied between two ends of a uniform metallic wire. Some heat is developed in it. The heat developed is doubled if A) Both the length and radius of the wire are halved. B) Both the length and radius of the wire are doubled. C) The radius of the wire is doubled. D) The length of the wire is doubled. Show Answer Correct Answer: B) Both the length and radius of the wire are doubled. 4. Electromotive force (emf) is measured in units of ..... A) Newton (N). B) Volt (V). C) Coulomb (C). D) Ampere (A). Show Answer Correct Answer: B) Volt (V). 5. Which items are needed to create an electromagnet? A) A magnet, a wire, and a battery. B) A magnet, a metal bar, and a battery. C) A magnet, a metal bar, and a wire. D) A metal bar, a wire, and a batter. Show Answer Correct Answer: D) A metal bar, a wire, and a batter. 6. Keeping the potential difference constant, the resistance of the circuit is halved, the current will become ..... A) Four times. B) Half. C) Double. D) One-third. Show Answer Correct Answer: C) Double. 7. What is the unit of drift velocity? A) Vm$^{-1}$. B) M$^{2}$ V$^{-1}$ S$^{-1}$. C) M V. D) A m$^{2}$s. Show Answer Correct Answer: B) M$^{2}$ V$^{-1}$ S$^{-1}$. 8. In a magnet the opposite poles will ..... A) Attract. B) Repel. C) All the above. D) None of the above. Show Answer Correct Answer: A) Attract. 9. What is internal resistance of 2.0V cell which gives a current 0.1A through resistance of 10ohm A) 10 ohm. B) 20 ohm. C) 30 ohm. D) 40 ohm. Show Answer Correct Answer: A) 10 ohm. 10. What is the power consumed by a lamp whose current is 6 A and the voltage across it is 120 V? A) 120 W. B) 720 W. C) 16 W. D) 10 W. Show Answer Correct Answer: B) 720 W. 11. Fill in the Blank:Opposite charges will ..... one another. A) Repel. B) Attract. C) Neutralize. D) Have no effect on. Show Answer Correct Answer: B) Attract. 12. An ideal voltmeter in physics has ..... A) An easily readable scale. B) An infinite resistance. C) Zero resistance. D) A negligible internal resistance. Show Answer Correct Answer: B) An infinite resistance. 13. What is the SI unit of potential difference? A) Volt. B) Ohm. C) Ampere. D) Coulomb. Show Answer Correct Answer: A) Volt. 14. If there is a gap or break in in the electrical flow-there is no electricity it is called A) Closed circuit. B) Short circuit. C) Open circuit. D) Discharge. Show Answer Correct Answer: C) Open circuit. 15. A piece of copper and another of germanium are cooled from room temperature to 77 K. The resistance of: A) Copper decreases and germanium increases. B) Copper increases and germanium decreases. C) Each of them increases. D) Each of them decreases. Show Answer Correct Answer: A) Copper decreases and germanium increases. 16. What is the effect of adding more resistors in parallel on the total resistance? A) The total resistance remains the same. B) The total resistance fluctuates randomly. C) The total resistance increases. D) The total resistance decreases. Show Answer Correct Answer: D) The total resistance decreases. 17. The cells that cannot be recharged are called A) Primary cell. B) Secondary cells. C) Normal cells. D) None of the above. Show Answer Correct Answer: A) Primary cell. 18. True or FalseLike charges repel A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 19. Power is measured in what units? A) Ohms. B) Volts. C) Amperes. D) Watts. Show Answer Correct Answer: D) Watts. 20. Which examples below describes naturally-occurring electricity? A) Battery. B) Current electricity. C) Quick release of energy. D) Getting shocked when plugging in a vacuum cleaner. Show Answer Correct Answer: C) Quick release of energy. 21. Which material would be a good conductor? A) Wood. B) Cardboard. C) Metal. D) Paper. Show Answer Correct Answer: C) Metal. 22. How many Volts would it take to push 1 Amp through a resistance of 1 Ohm A) 10 volts. B) 1 volt. C) 48 volts. D) 5 volts. Show Answer Correct Answer: B) 1 volt. 23. Wires C and D are made from the same material. Wire C has a resistance of $48\Omega$ A) 12 $\Omega$. B) 24 $\Omega$. C) 48 $\Omega$. D) 96 $\Omega$. Show Answer Correct Answer: D) 96 $\Omega$. 24. Which of the following materials is not a conductor? A) Wire wool. B) Ionic solution. C) Steel. D) Plastic. Show Answer Correct Answer: D) Plastic. 25. What does the resistance of a wire tell you? A) The speed of electron flow through it. B) How tough it is for electrons to flow through it. C) The amount of energy given to the electrons. D) The amount of energy taken away from the electrons. Show Answer Correct Answer: B) How tough it is for electrons to flow through it. ← 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