This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Physics (Part I) Chapter 3 Current Electricity – Quiz 55 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 55 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which side of the circuit has the less amount of voltage? A) The positive side. B) The bulbs. C) The negative side. D) The wires near the bulbs. Show Answer Correct Answer: C) The negative side. 2. If too much electricity is flowing through a circuit wires heat up and can start a fire A) Short circuit. B) Parallel circuit. C) Series circuit. D) Terminals. Show Answer Correct Answer: A) Short circuit. 3. Which statement is true about the drift velocity of the electrons in a current-carrying metallic conductor? A) It is directly proportional to the diameter of the conductor. B) It is inversely proportional to the current. C) It is inversely proportional to the number of conduction electrons per unit volume. D) It is directly proportional to the resistance of the conductor if the potential difference across the conductor is kept constant. Show Answer Correct Answer: C) It is inversely proportional to the number of conduction electrons per unit volume. 4. This measures the speed of the current in a circuit A) Voltage. B) Ammeter. C) Switch. D) Resistance. Show Answer Correct Answer: B) Ammeter. 5. A voltmeter is described as a device that can be used to measure A) Voltage. B) Current. C) Resistance. D) Power. Show Answer Correct Answer: A) Voltage. 6. Current is referred to as: A) Flow of electricity. B) Circuits. C) Flow of electrons. D) Batteries. Show Answer Correct Answer: C) Flow of electrons. 7. If resistance slows the current, you will need more ..... to speed it up. A) Resistance. B) Voltage. C) Current. D) None of the above. Show Answer Correct Answer: B) Voltage. 8. What reusable device stops the flow of charges by switching "off" the current if it gets too high? A) Fuse. B) Outlet. C) Circuit breaker. D) Charger. Show Answer Correct Answer: C) Circuit breaker. 9. The pathway through which electrical current flows A) Circuit. B) Flows. C) Insulator. D) Electromagnet. Show Answer Correct Answer: A) Circuit. 10. What is the equation to calculate current in a circuit? A) I = V x R. B) I = V / R. C) I = Q / t. D) I = P / V. Show Answer Correct Answer: C) I = Q / t. 11. Work of 24 J is done in a moving 4 C ( coulomb )of charge between two points on a conductor wire, then the potential difference between two points is A) 24 V. B) 6 V. C) 0.6 V. D) 14 V. Show Answer Correct Answer: B) 6 V. 12. SI unit if resistivity A) Ohm. B) Ampere. C) Ohm metre. D) Volt. Show Answer Correct Answer: C) Ohm metre. 13. 1 mA = ..... A A) $10^{-3}$. B) $10^{-6}$. C) $10^3$. D) None of the above. Show Answer Correct Answer: A) $10^{-3}$. 14. A device used to open or close a circuit A) Switch. B) Battery. C) Electricity. D) Charge. Show Answer Correct Answer: A) Switch. 15. A wire of resistance R is stretched to twice of its original length. Its new resistance will be A) 4R. B) R/9. C) 3R. D) R/3. Show Answer Correct Answer: A) 4R. 16. This type of circuit only has one path for current to flow. A) Series. B) Parallel. C) Combination. D) Split. Show Answer Correct Answer: A) Series. 17. Assertion:dielectric polarization means formation of positive and negative charges inside the dielectricReason:free electrons are formed in this process A) Assertion is correct and reason is a correct explanation of assertion. B) Assertion is correct but reason is not a correct explanation of assertion. C) Assertion is correct, reason is incorrect. D) None of the above. Show Answer Correct Answer: C) Assertion is correct, reason is incorrect. 18. A copper wire is connected across the terminals of battery of e.m.f. 9.0 V.Calculate the electrical energy used to move 50 C of charge across the complete circuit. A) 0.18 J. B) 5.56 J. C) 450 J. D) None of the above. Show Answer Correct Answer: C) 450 J. 19. The colour sequence in a carbon resistor is red, brown, orange and silver. The resistance of the resistor is A) 21 $\times$ $\pm$. B) 23 $\times$ $\pm$. C) 21 $\times$ $\pm$. D) 12 $\times$ $\pm$. Show Answer Correct Answer: A) 21 $\times$ $\pm$. 20. What type of equipment is used to measure the current induced when a wire passes through a magnetic field? A) A transformer. B) A galvanometer. C) A generator. D) An insulated wire. Show Answer Correct Answer: B) A galvanometer. 21. How does an ammeter is added in the circuit? A) Series. B) Parallel. C) All the above. D) None of the above. Show Answer Correct Answer: A) Series. 22. Explain Kirchhoff's Second Law with a practical application. A) The total resistance in a circuit is equal to the sum of the individual resistances. B) Kirchhoff's Second Law states that energy is conserved in electrical circuits. C) Kirchhoff's Second Law states that the sum of the emf in a closed loop equals the sum of the potential drops across components. D) The sum of currents in a closed loop equals the sum of the voltages across components. Show Answer Correct Answer: C) Kirchhoff's Second Law states that the sum of the emf in a closed loop equals the sum of the potential drops across components. 23. Apply your understanding of electricity to select the essential element needed to create static electricity: A) A complete circuit. B) Contact between two insulators. C) A good conductor. D) A source of moisture. Show Answer Correct Answer: B) Contact between two insulators. 24. Which is a good conductor of electricity? A) Glass. B) Gold. C) Plastic. D) Wood. Show Answer Correct Answer: B) Gold. 25. Calculate the voltage applied when a 60 watt light-bulb uses a current of 5 amps A) 300 volts. B) 30 volts. C) 12 volts. D) 0.08 volts. Show Answer Correct Answer: C) 12 volts. ← 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