This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Physics (Part I) Chapter 3 Current Electricity – Quiz 4 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 4 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What happens to the resistance of a conductor as its temperature increases? A) Decreases. B) Becomes zero. C) Increases. D) Remains the same. Show Answer Correct Answer: C) Increases. 2. In a Series circuit the more lightbulbs you add the brighter they get A) False. B) True. C) All the above. D) None of the above. Show Answer Correct Answer: A) False. 3. A student has 10 resistors of resistance r each. The minimum resistance made by him from the given resistors is A) 10 r. B) R/100. C) R/10. D) 5/5. Show Answer Correct Answer: C) R/10. 4. In an experiment with potentiometer to measure the internal resistance of a cell, when the cell is shunted by 5 resistance, the null point is obtained at 2m. When the cell is shunted by 20 resistance, the null point is obtained at 3m, The internal resistance of cell is: ..... A) 2 ohm. B) 4 ohm. C) 6 ohm. D) 8 ohm. Show Answer Correct Answer: A) 2 ohm. 5. The potential difference between the two ends of the wires is equal to the ..... A) Resistance. B) Energy source current. C) Potential difference between the two terminals of the battery. D) The parallel end of the component. Show Answer Correct Answer: C) Potential difference between the two terminals of the battery. 6. True or False:Electrons are the mobile charge carriers in an electric circuit. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 7. An electric current always flows in a closed path, or loop. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 8. The other name for voltage is A) Potential difference. B) Current. C) Resistance. D) Load. Show Answer Correct Answer: A) Potential difference. 9. Changes chemical energy into electrical energy A) Resistor. B) Cell. C) Fuse. D) Terminal. Show Answer Correct Answer: B) Cell. 10. When we double both the voltage and current in a simple electric circuit keeping its resistance constant, the power will be A) Remain unchanged. B) Halves. C) Doubles. D) Quadruples. Show Answer Correct Answer: D) Quadruples. 11. The flow of electricity requires a A) Complete path. B) Incomplete path. C) Insulated current. D) None of the above. Show Answer Correct Answer: A) Complete path. 12. The resistance of the wire varies inversely as A) Area of cross section. B) Resistivity. C) Length. D) Temperature. Show Answer Correct Answer: A) Area of cross section. 13. Which is not an example of Human-harnessed electricity? A) Hydroelectric dam. B) Wind mill. C) Lamp. D) Lightening. Show Answer Correct Answer: D) Lightening. 14. What is the primary function of generators in power plants? A) To change electrical energy into mechanical energy. B) To change mechanical energy into electrical energy. C) To store electrical energy. D) None of the above. Show Answer Correct Answer: B) To change mechanical energy into electrical energy. 15. Kirchhoff's second law is based on law of conservation of A) Sum of mass and energy. B) Momentum. C) Energy. D) Charge. Show Answer Correct Answer: C) Energy. 16. What is the SI unit of current? A) Volt. B) Ohm. C) Ampere. D) Coulomb. Show Answer Correct Answer: C) Ampere. 17. What is the property of matter which causes two like charges to repel each other? A) Electric field. B) Electric circuit. C) Electric charge. D) Electromagnet. Show Answer Correct Answer: C) Electric charge. 18. The current in which negative charges start from negative terminal and ends in the positive terminal is known as A) Conventional Current. B) Electronic Current. C) Ionic Current. D) All the above. Show Answer Correct Answer: B) Electronic Current. 19. An appliance which is connected in a circuit A) Load. B) Rheostat. C) Key. D) Cell. Show Answer Correct Answer: A) Load. 20. What is the power of 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. 21. The internal resistance of a cell is the resistance of A) Material used in the cell. B) Electrolyte used in the cell. C) Electrodes of the cell. D) Vessel of the cell. Show Answer Correct Answer: B) Electrolyte used in the cell. 22. Unit for resistance A) Ampere. B) Ohm. C) Volt. D) Watt. Show Answer Correct Answer: B) Ohm. 23. We have 30 Watt, 6V bilb which we want to glow by supply of 120V. What resistance should be connected with the bulb? A) 20 ohm in series. B) 22.8 ohm in series. C) 30 ohm in series. D) 22.8 ohm in parallel. Show Answer Correct Answer: B) 22.8 ohm in series. 24. Calculate the current an electric clothes dryer draws when it is connected to a 230 V source and has a resistanceof 9.2 $\Omega$. A) 5A. B) 15A. C) 25A. D) 35A. Show Answer Correct Answer: C) 25A. 25. What slows down the flow of electricity in a circuit? A) Resistance. B) Voltage. C) Current. D) Source of electric current. Show Answer Correct Answer: A) Resistance. ← 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 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