This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Physics (Part I) Chapter 3 Current Electricity – Quiz 9 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 9 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Identify the definition of sensitivity of a galvanometer from the following. A) Ratio of deflection in the galvanometer to half the unit change in unknown resistance. B) Ratio of deflection in the galvanometer to the unit change in unknown resistance. C) Ratio of unit change in unknown resistance to twice the deflection in the galvanometer. D) Ratio of unit change in unknown resistance to the deflection in the galvanometer. Show Answer Correct Answer: B) Ratio of deflection in the galvanometer to the unit change in unknown resistance. 2. The amount of obstruction to the flow of current is known as ..... A) Resistance. B) Voltage. C) Current. D) Charge. Show Answer Correct Answer: A) Resistance. 3. An electric current flows through a continuous loop known as a ..... A) Circuit. B) Field. C) Domain. D) Switch. Show Answer Correct Answer: A) Circuit. 4. What is the formula for potential difference? A) V = W/Q. B) V = Q/W. C) V = W/t. D) V = Q/t. Show Answer Correct Answer: A) V = W/Q. 5. A 220 volt, 1000 watt bulb is connected across a 110 volt mains supply. The power consumed will be A) 1kW. B) 750W. C) 500W. D) 250W. Show Answer Correct Answer: D) 250W. 6. Which of the following is not a practical application of static electricity? A) Photocopying machines. B) Paint Spraying. C) Driving a Tractor. D) Electrostatic Precipitators. Show Answer Correct Answer: C) Driving a Tractor. 7. What is the rate at which energy is transferred in a circuit called? A) Voltage. B) Current. C) Power. D) Resistance. Show Answer Correct Answer: C) Power. 8. Which sign is associated with a positive charge? A) -. B) +. C) =. D) $. Show Answer Correct Answer: B) +. 9. The mathematical relationship among Voltage, Current, and Resistance A) Faraday's Law. B) Tesla's Law. C) Edison's Law. D) Ohm's Law. Show Answer Correct Answer: D) Ohm's Law. 10. Define electromotive force. A) It is the work done by the source in driving charges around a complete circuit. B) It is the work done by the source in driving a unit charge around a complete circuit. C) It is a measure of the rate of flow of electric charge through a given cross-section of a conductor. D) It is a measure of the flow of electric charge through a given cross-section of a conductor. Show Answer Correct Answer: B) It is the work done by the source in driving a unit charge around a complete circuit. 11. What is the main function of a turbine? A) Producing a magnetic field. B) Spinning. C) Reducing the voltage of an electrical current. D) Increasing the voltage of an electrical current. Show Answer Correct Answer: B) Spinning. 12. An electric circuit is ..... A) A continuous pathway that can carry an electric current. B) An open pathway that can carry electric current. C) An object that resists the flow of energy. D) An object that attracts metal. Show Answer Correct Answer: A) A continuous pathway that can carry an electric current. 13. Known as Naturally Occurring electricity A) Static Electricity. B) Current Electricity. C) All the above. D) None of the above. Show Answer Correct Answer: A) Static Electricity. 14. What is the symbol used for charge in equations? A) R. B) V. C) I. D) Q. Show Answer Correct Answer: D) Q. 15. A circuit with the switch open allows A) Electricity to flow so the device is off. B) Electricity to not flow so the device is on. C) Electricity to flow so the device is on. D) Electricity to not flow so the device is off. Show Answer Correct Answer: D) Electricity to not flow so the device is off. 16. In the circuit, the bulb lights up because there is ..... flowing in the closed circuit. A) Battery. B) Current. C) Resistance. D) Voltage. Show Answer Correct Answer: B) Current. 17. In an electric circuit, electron flow from a point of ..... potential to the point of ..... potential A) (a) lower. B) (b) Higher. C) Midium. D) Option a and b. Show Answer Correct Answer: D) Option a and b. 18. What causes resistance? A) Electrons colliding with ions in the insulator. B) Electrons colliding with ions in the conductor. C) Protons colliding with ions in the conductor. D) None of the above. Show Answer Correct Answer: B) Electrons colliding with ions in the conductor. 19. What is the formula of current? A) I = Q x t. B) I = Q / t. C) Q = I / t. D) None of the above. Show Answer Correct Answer: B) I = Q / t. 20. The flow of electrical energy is called a(n) A) Insulator. B) Current. C) Circuit. D) Electron. Show Answer Correct Answer: B) Current. 21. The resistance of resistor 1 is twice the resistance of resistor 2. The two are connected in parallel and a potential difference is maintained across the combination. Then: A) The current in 1 is twice that in 2. B) The current in 1 is half that in 2. C) The potential difference across 1 is twice that across 2. D) The potential difference across 1 is half that across 2. Show Answer Correct Answer: B) The current in 1 is half that in 2. 22. Fill in the Blank:Current Electricity is measured in ..... A) Volts. B) Amperes. C) Electrons. D) Speed. Show Answer Correct Answer: B) Amperes. 23. ..... electricity is temporary. A) Mains supply. B) Static. C) None of the above. D) None of the above. Show Answer Correct Answer: B) Static. 24. Blocks electricity from moving through A) Source. B) Filament. C) Conductor. D) Insulator. Show Answer Correct Answer: D) Insulator. 25. What does the term 'potential difference' refer to? A) Work done per unit charge. B) Charge per unit time. C) Resistance per unit length. D) Current per unit voltage. Show Answer Correct Answer: A) Work done per unit charge. ← 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 10Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books