This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Physics (Part I) Chapter 3 Current Electricity – Quiz 39 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 39 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Resistance of carbon filament lamp ..... as the applied voltage increases A) Increases. B) Decreases. C) Remains same. D) None of the above. Show Answer Correct Answer: B) Decreases. 2. Silver is a ..... ? A) Insulator. B) Conductor. C) All the above. D) None of the above. Show Answer Correct Answer: B) Conductor. 3. A flat iron is marked "120 V, 600 W" . In normal use, the current in it is: A) 2 A. B) 4 A. C) 5 A. D) 7.2 A. Show Answer Correct Answer: C) 5 A. 4. Rubber, plastic, paper and glass are all examples of ..... A) Electrical conductors. B) Insulators. C) All the above. D) None of the above. Show Answer Correct Answer: B) Insulators. 5. When a piece of metal becomes positively charged it has:(a) A) Gained protons. B) Gained electrons. C) A. Lost electrons. D) None of the above. Show Answer Correct Answer: C) A. Lost electrons. 6. What does mechanical energy turn to generate power? A) A generator. B) A turbine. C) A solar panel. D) None of the above. Show Answer Correct Answer: B) A turbine. 7. Keeping potential difference constant if resistance is doubled then electric current is A) Doubled. B) Halved. C) Reduced to zero. D) Tripled. Show Answer Correct Answer: B) Halved. 8. Wheat Stone Bridge experiment is most sensitive, when: A) :All four resistances are approximately equal. B) One of the resistances is very high as compare to others. C) One of the resistances is very low as compare to others. D) Any two resistances are equal to infinity. Show Answer Correct Answer: A) :All four resistances are approximately equal. 9. The maximum constant velocity of an object falling vertically downward is called: A) Final velocity. B) Terminal velocity. C) Instantaneous velocity. D) Average velocity. Show Answer Correct Answer: B) Terminal velocity. 10. A student is investigating how changing the size of the core of an electromagnet affects its strength. Which of these is most likely the dependent variable in the student's investigation? A) The number of wire coils wrapped around the core. B) The number of paper clips picked up by the electromagnet. C) The voltage of the battery used in the circuit. D) The size of the piece of iron used as the core. Show Answer Correct Answer: B) The number of paper clips picked up by the electromagnet. 11. As temperature increases, resistance of a metalic conductor ..... A) Increases. B) Decreases. C) Remains same. D) None of the above. Show Answer Correct Answer: B) Decreases. 12. Explain the concept of capacitance and its unit of measurement. A) The unit of measurement for capacitance is the volt (V). B) The farad is a measure of electrical resistance. C) Capacitance is measured in ohms ($\Omega$). D) The unit of measurement for capacitance is the farad (F). Show Answer Correct Answer: D) The unit of measurement for capacitance is the farad (F). 13. A car battery is rated at 80 A h. An ampere-hour is a unit of: A) Power. B) Energy. C) Current. D) Charge. Show Answer Correct Answer: D) Charge. 14. What is 0.0006 written in standard form? A) $6\times10^4$. B) $6\times10^{-4}$. C) $6\times10^3$. D) $6\times10^{-3}$. Show Answer Correct Answer: B) $6\times10^{-4}$. 15. Which of the following procedures will double the force on two point charges? A) Halving the distance between the charges. B) Doubling the magnitude of one charge. C) Halving the magnitude of one charge. D) Doubling the distance between the charges. Show Answer Correct Answer: B) Doubling the magnitude of one charge. 16. Lightning is a form of ..... electricity A) Static. B) Current. C) Aerial. D) None of the above. Show Answer Correct Answer: A) Static. 17. What happens when you rub a balloon on your hair and then place it near a wall? A) The balloon will stick to the wall due to static electricity. B) The balloon will fall to the ground due to gravity. C) The balloon will explode due to pressure. D) The balloon will change color due to chemical reaction. Show Answer Correct Answer: A) The balloon will stick to the wall due to static electricity. 18. Fill in the blank:A ..... object will be attracted to a charged object. A) Positively Charged. B) Negatively Charged. C) Neutral. D) Current. Show Answer Correct Answer: C) Neutral. 19. Current is measured in what units? A) Volts. B) Ohms. C) Amperes. D) Watts. Show Answer Correct Answer: C) Amperes. 20. What is the effect of one negatively charged object and one positively charged object coming close to each other. A) The objects repel each other. B) The objects attract each other. C) All the above. D) None of the above. Show Answer Correct Answer: B) The objects attract each other. 21. What is the purpose of a switch? A) To open and close the circuit. B) To carry the electricity through the circuit. C) To make a fun clicking sound. D) To supply the power to the circuit. Show Answer Correct Answer: A) To open and close the circuit. 22. An electron enters a region of uniform perpendicular E and B fields. It is observed that the velocity v of the electron is unaffected. A possible explanation is: A) Undefined is parallel to $\overrightarrow{E}$. B) $\overrightarrow{v}$ $\overrightarrow{B}$. C) $\overrightarrow{v}$ $\overrightarrow{E}$ $\overrightarrow{B}$. D) Undefined is perpendicular to bothundefinedandundefinedand has magnitude E/B. Show Answer Correct Answer: D) Undefined is perpendicular to bothundefinedandundefinedand has magnitude E/B. 23. A conductor carries a current of 50mA if the area of cross-section of the conductor is 50 mm$^{2 }$then value of the current density in Am$^{-2}$ is A) 0.5. B) 1. C) 10$^{-1}$. D) 3/10. Show Answer Correct Answer: B) 1. 24. What is the direction of electron flow in a circuit? A) From positive to negative terminal. B) From negative to positive terminal. C) In a clockwise direction. D) In a counterclockwise direction. Show Answer Correct Answer: B) From negative to positive terminal. 25. I try to keep electricity from getting to you. A) Conductor. B) Fuse. C) Electric discharge. D) Insulator. Show Answer Correct Answer: D) Insulator. ← 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