This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Physics (Part I) Chapter 3 Current Electricity – Quiz 7 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 7 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is the function of every generator on Earth? A) Changing wind energy into electrical energy. B) Changing heat energy into electrical energy. C) Changing mechanical energy into electrical energy. D) Changing solar energy into electrical energy. Show Answer Correct Answer: C) Changing mechanical energy into electrical energy. 2. Which is the most commonly used conductor in electrical circuits? A) Copper. B) Aluminium. C) Silver. D) Gold. Show Answer Correct Answer: A) Copper. 3. Electric current comes from the movement or flow of ..... charged electrons around an electric circuit. A) Proton. B) Neutral. C) Negatively. D) Positively. Show Answer Correct Answer: C) Negatively. 4. What is the equation for Ohm's Law? A) I = V x R. B) I = V / R. C) V = I x R. D) R = V / I. Show Answer Correct Answer: B) I = V / R. 5. What is the unit of electric potential? A) Joule. B) Coulomb. C) Ampere. D) Volt. Show Answer Correct Answer: D) Volt. 6. A man standing near a fast moving train may fall. A) Away from the train. B) Towards the train. C) On the same place. D) In the direction of train. Show Answer Correct Answer: B) Towards the train. 7. Static electricity is a A) Quick release of energy. B) Steady flow of electric current. C) Human-harness. D) Current used in the house. Show Answer Correct Answer: A) Quick release of energy. 8. Build up of electrical charge on material-not flowing A) Static electricity. B) Current electriciity. C) Series circuit. D) Parallel circuit. Show Answer Correct Answer: A) Static electricity. 9. The ratio of masses of three wires 1:2:3 and that of their lengths is 3:2:1.If the wires are made of same material, the ratio of their resistances will be A) 1:1:1. B) 1:2:3. C) 9:4:1. D) 27:6:1. Show Answer Correct Answer: D) 27:6:1. 10. The current through each load connected in series ..... A) Will add up to the total current. B) Is the same everywhere. C) All the above. D) None of the above. Show Answer Correct Answer: B) Is the same everywhere. 11. A filament bulb of 500W, 100V it to be used in 230 V main supply. When a resistance R is connected in series, it works perfectly and bulb consumes 500W. The value of R is: A) 26 ohm. B) 13 ohm. C) 230 ohm. D) 46 ohm. Show Answer Correct Answer: A) 26 ohm. 12. Electrical potential is ..... A) Scalar quantity. B) Vector quantity. C) Both scalar and vector. D) Neither scalar nor vector. Show Answer Correct Answer: A) Scalar quantity. 13. An ammeter has A) High resistance. B) Low resistance. C) All the above. D) None of the above. Show Answer Correct Answer: B) Low resistance. 14. To convert moving coil galvanometer in an ammeter a ..... is connected . A) A low resistance in parallel. B) A high resistance in parallel. C) A high resistance in series. D) A low resistance in series. Show Answer Correct Answer: A) A low resistance in parallel. 15. The flow of electricity goes from ..... to ..... in a battery. A) Negative to Positive. B) Positive to Negative. C) Positive to Positive. D) Negative to Negative. Show Answer Correct Answer: B) Positive to Negative. 16. Which best describes electromagnetism? A) The electrical component of a magnet. B) The flow of electric charges between two magnets. C) The interaction between electrical energy and magnetism. D) The flow of a magnetic field between electrons. Show Answer Correct Answer: C) The interaction between electrical energy and magnetism. 17. Harry replaces the switch in an electric circuit with a different object. The light bulb in the circuit does not light up. What can Harry conclude? A) The object is made of metal. B) The object is an insulator. C) The object is a conductor. D) The object is made of rubber. Show Answer Correct Answer: B) The object is an insulator. 18. Rheostat A) Resistor. B) Thermister. C) Variable capacitor. D) Variable resistor. Show Answer Correct Answer: D) Variable resistor. 19. Which device measures the potential difference in the circuit? A) Voltmetre. B) Ammeter. C) Galvanometer. D) None of the above. Show Answer Correct Answer: A) Voltmetre. 20. The SI Unit of electric Potential is the ..... A) Volt. B) Ampere. C) Current. D) Coulumb. Show Answer Correct Answer: A) Volt. 21. A wire of a certain material is stretched slowly by 10%. Its new resistance and specific resistance become respectively A) Both remain the same. B) 1.1 times, 1.1 times. C) 1.21 times, same. D) 1.1 times, same. Show Answer Correct Answer: C) 1.21 times, same. 22. What is the equation to calculate charge passing a point in a circuit? A) Q = V x R. B) Q = I x R. C) Q = I / t. D) Q = V / I. Show Answer Correct Answer: C) Q = I / t. 23. Which device measures the current in the circuit? A) Voltmetre. B) Ammeter. C) Galvanometer. D) None of the above. Show Answer Correct Answer: B) Ammeter. 24. A battery has an e.m.f of 6.0 V. When it is connected to an external resistor, the potential different is 2.6 V and the current is 0.6 A. What is the value of the internal resistance? A) 3.4 $\Omega$. B) 4.3 $\Omega$. C) 4.4 $\Omega$. D) 5.7 $\Omega$. Show Answer Correct Answer: D) 5.7 $\Omega$. 25. What is known as the difference between the earth's magnetic pole and its geographic pole? A) Magnetic declination. B) Magnetic difference. C) Geographic decline. D) Geographic increase. Show Answer Correct Answer: A) Magnetic declination. ← 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 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