This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Physics (Part I) Chapter 3 Current Electricity – Quiz 2 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 2 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. When a magnetic South pole is brought close to a magnetic North pole, the magnets will A) Attract. B) Repel. C) Create sparks. D) Cancel each other out. Show Answer Correct Answer: A) Attract. 2. A 1KW heater has resistance R1 and 100W tungsten bulb has resistance R2 both are marked for 230V, then- A) R1=R2. B) R1>R2. C) R1 D) Eaither option b or c. Show Answer Correct Answer: C) R1 3. Why are parallel circuits more useful in more appliances than series circuits? A) Parallel circuits are cheaper to build. B) They allow many appliances to be used at one time. C) Parallel circuits take up less room. D) Series circuits produce short circuits, but parallel circuits don't. Show Answer Correct Answer: B) They allow many appliances to be used at one time. 4. Lightning strike is the electric discharge from cloud to ground. A) False. B) True. C) All the above. D) None of the above. Show Answer Correct Answer: B) True. 5. If a resistor has a resistance of 10$\Omega$, what is its conductance? A) 0.5 S. B) 1 S. C) 0.1 S. D) 5 S. Show Answer Correct Answer: C) 0.1 S. 6. When a conductor carries a current, the number of conduction electrons that flow in the conductor for 10 s is 3.75 $\times10^{20}$ A) 3.8 A. B) 4.2 A. C) 6.0 A. D) 10 A. Show Answer Correct Answer: C) 6.0 A. 7. Which best describes a parallel circuit? A) Electricity flows along one pathway. B) The flow of electricity comes from more than one source. C) Electricity flows along more than one pathway. D) The flow of electricity comes from more than 1 load. Show Answer Correct Answer: C) Electricity flows along more than one pathway. 8. When you flip a light switch on and off you are closing and opening a circuit. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 9. Adding another light bulb to a series circuit would ..... A) Make the lights dimmer. B) Make the lights brighter. C) Turn off the lights. D) Burn out the lights. Show Answer Correct Answer: A) Make the lights dimmer. 10. 32 cells each of emf 3 V are connected in series and kept in a box. Externally, the combination shows an emf of 84 V. The number of cells reversed in the connection is ..... A) 0. B) 2. C) 4. D) 8. Show Answer Correct Answer: B) 2. 11. A toaster operating at 240 V has aresistance of 120 $\Omega$. Its power is A) 400 W. B) 2 W. C) 480 W. D) 240 W. Show Answer Correct Answer: C) 480 W. 12. One coulomb of electrons is equal to one ..... A) Amp. B) Volt. C) Ohm. D) Watt. Show Answer Correct Answer: A) Amp. 13. The best instrument for accurate measurement of emf of a cell is A) Wheatstone bridge. B) Ammeter. C) Potentiometer. D) Voltmeter. Show Answer Correct Answer: C) Potentiometer. 14. What is the significance of the equivalent capacitance in a circuit? A) It indicates the power consumption of the circuit. B) It determines the voltage across each capacitor in a circuit. C) It is used to measure the resistance of a circuit. D) The equivalent capacitance allows for easier analysis and calculation of total capacitance in circuits with multiple capacitors. Show Answer Correct Answer: D) The equivalent capacitance allows for easier analysis and calculation of total capacitance in circuits with multiple capacitors. 15. Kelly wants to start a science club that investigates the interactions between electrical energy and magnetism. What is the main process that this club will investigate? A) Electromagnetism. B) Electric charge. C) Electronic devices. D) Electrical safety. Show Answer Correct Answer: A) Electromagnetism. 16. Known as Human Harnessed electricity A) Static Electricity. B) Current Electricity. C) All the above. D) None of the above. Show Answer Correct Answer: B) Current Electricity. 17. 1 $\mu$A equals A) 1 $\mu$A = 0.001 A. B) 1 $\mu$A = 1 A. C) 1 $\mu$A = 1000 mA. D) 1 $\mu$A = 0.000001 A. Show Answer Correct Answer: D) 1 $\mu$A = 0.000001 A. 18. What is alternating current? A) Current that flows in a loop. B) Current that flows in one direction, then in the reverse direction. C) Current that flows randomly. D) None of the above. Show Answer Correct Answer: B) Current that flows in one direction, then in the reverse direction. 19. What device is used to measure electric current? A) Capacitor. B) Resistor. C) Ammeter. D) Voltmeter. Show Answer Correct Answer: C) Ammeter. 20. According to ohm's law A) Current is directly proportional to the potential difference. B) Current is inversely proportional to the potential difference. C) Current is directly proportional to the resistance. D) None of the above. Show Answer Correct Answer: A) Current is directly proportional to the potential difference. 21. Which of the following best describes static electricity? A) A build-up of electric charges on the surface of an object. B) A continuous flow of electric charges through a conductor. C) The conversion of electrical energy into mechanical energy. D) The conversion of electrical energy into light energy. Show Answer Correct Answer: A) A build-up of electric charges on the surface of an object. 22. Name the instrument used to control current in an electric circuit. A) Rheostat. B) Valnometer. C) Galvanometer. D) Ammeter. Show Answer Correct Answer: A) Rheostat. 23. Which way will NOT increase the strength of the magnetic field of an electromagent A) Increasing the current. B) Using a stronger ferromagnetic core. C) Winding the coils closer together. D) Decreasing the number of loops. Show Answer Correct Answer: D) Decreasing the number of loops. 24. How much current will heater rated 2.5KW draw, when connected to 250V supply A) 40A. B) 30A. C) 20A. D) 10A. Show Answer Correct Answer: D) 10A. 25. Which of these is NOT a necessary part of a circuit? A) Wire. B) Battery. C) Switch. D) Load. Show Answer Correct Answer: C) Switch. ← PreviousNext →Related QuizzesClass 12 Physics (Part I) Chapter 3 Current Electricity Quiz 1Class 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 10Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books