This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Physics (Part I) Chapter 3 Current Electricity – Quiz 54 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 54 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. If you increase the resistance of a parallel circuit by adding more loads, what happens? A) Current decreases at the source. B) Current increases at the souce. C) Electrons disappear. D) Bulbs get brighter. Show Answer Correct Answer: B) Current increases at the souce. 2. A standard resistance of 1 ohm and a small resistance 'r' are connected in series. The balancing length on potentiometer wire corresponding to this combination is 630 cm whereas the balancing length corresponding to 1 ohm resistance is 600 cm. The value of 'r' will be ..... A) 0.5 ohm. B) 1 ohm. C) 2 ohm. D) 0.05 ohm. Show Answer Correct Answer: D) 0.05 ohm. 3. ..... termed the word electriciity. A) Benjamin Franklin. B) William Gilbert. C) Isaac Newton. D) None of the above. Show Answer Correct Answer: B) William Gilbert. 4. The chemical reaction inside a secondary cell is A) Reversibe. B) Irreversible. C) All the above. D) None of the above. Show Answer Correct Answer: A) Reversibe. 5. What is the unit of electrical power? A) Volt (V). B) Ohm ($\Omega$). C) Ampere (A). D) Watt (W). Show Answer Correct Answer: D) Watt (W). 6. Negative charges will repel A) Positive charges. B) Neutral charges. C) Negative charges. D) All charges. Show Answer Correct Answer: C) Negative charges. 7. How does the power consumed by a resistor change if the voltage across it is doubled? A) The power consumed by the resistor decreases by half. B) The power consumed by the resistor increases by a factor of two. C) The power consumed by the resistor remains the same. D) The power consumed by the resistor increases by a factor of four. Show Answer Correct Answer: D) The power consumed by the resistor increases by a factor of four. 8. The coil of current-carrying wire with an iron core is called a(n) A) Ferromagnet. B) Electromagnet. C) Compass. D) Maglev. Show Answer Correct Answer: B) Electromagnet. 9. If the current flowing through a fixed resistor is halved, the heat produced in it will become ..... A) One-fourth. B) One-half. C) Double. D) Four times. Show Answer Correct Answer: A) One-fourth. 10. What is the current if a charge of 25 coulombs passes in 5 seconds? A) 0.2 Amps. B) 125 Amps. C) 5 Amps. D) None of the above. Show Answer Correct Answer: C) 5 Amps. 11. Matter through which electrons can flow easily A) Circuit. B) Conductor. C) Insulator. D) Charge. Show Answer Correct Answer: B) Conductor. 12. Work done in moving a charge of 2C across 2 points having a potential difference of 12V is A) 6J. B) 24J. C) 12J. D) 48J. Show Answer Correct Answer: B) 24J. 13. By using only two resistors, R$_{1}$ and R$_{2}$, a student is able to obtain resistances of 3 $\Omega$, 4 $\Omega$, 12 $\Omega$, and 16 $\Omega$. The values of R$_{1}$ and R$_{2}$ (in ohms) are: A) 4, 12. B) 4, 16. C) 3, 16. D) 3, 4. Show Answer Correct Answer: A) 4, 12. 14. If you have a 3 bulb series circuit, what will happen if one of your light bulbs goes out? A) Bulbs get brighter. B) Bulbs get dimmer. C) Bulbs go out. D) Nothing happens. Show Answer Correct Answer: C) Bulbs go out. 15. In the wheatstone Bridge all four arms have equal resistance R and Galvanometer also has R resistance. Find the equivalent resistance of the ckt A) R. B) R/2. C) R/4. D) 2R. Show Answer Correct Answer: A) R. 16. Ampere is the SI unit of which of the following quantities A) Luminous Intensity. B) Electric Current. C) Resistance. D) Pressure. Show Answer Correct Answer: B) Electric Current. 17. What is the maximum resistance which can be made using five resistor each of 1/5 ohm? A) 1/5 ohm. B) 10 ohm. C) 5 ohm. D) 1 ohm. Show Answer Correct Answer: D) 1 ohm. 18. The metal wire that glows in a light bulb A) Filament. B) Glass. C) Support wires. D) Metal tip. Show Answer Correct Answer: A) Filament. 19. What formula is used to calculate current? A) Current = Resistance * Voltage. B) Current = Charge / Time. C) Current = Power / Voltage. D) Current = Voltage / Resistance. Show Answer Correct Answer: B) Current = Charge / Time. 20. The quantity which remains same in series combination of resistors is ..... A) Voltage. B) Current. C) Power. D) None of the above. Show Answer Correct Answer: B) Current. 21. Electricity is a form of energy produced by charges. A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: A) TRUE. 22. Electrical conductor contains A) Only bound electrons. B) Neither bound nor free electrons. C) Only free. D) Both free and bound electrons. Show Answer Correct Answer: D) Both free and bound electrons. 23. Where is the strongest attraction force of the magnet? A) At the poles. B) In the middle. C) Above the magnet. D) Below the magnet. Show Answer Correct Answer: A) At the poles. 24. Which of the following is a real-world application of current electricity? A) Powering a television. B) Lightning during a storm. C) A balloon sticking to a wall after being rubbed. D) A spark from a doorknob. Show Answer Correct Answer: A) Powering a television. 25. A galvanometer can be converted into a voltmeter by connecting a A) High resistance in parallel. B) High resistance in series. C) Low resistance in parallel. D) Low resistance in series. Show Answer Correct Answer: B) High resistance in series. ← 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