This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Physics (Part I) Chapter 3 Current Electricity – Quiz 50 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 50 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The flow of current electricity that always goes in one direction is ..... A) Alternating Current. B) Direct Current. C) Solar cells. D) Wall socket. Show Answer Correct Answer: B) Direct Current. 2. What type of metal are most wires made of? A) Silver. B) Copper. C) Steel. D) None of the above. Show Answer Correct Answer: B) Copper. 3. ..... is a good conductor of electricity. A) Copper. B) Aluminium. C) Gold. D) All of the above. Show Answer Correct Answer: D) All of the above. 4. Energy stored in the earth in the form of heat. A) GEOTHERMAL. B) SOLAR ENERGY. C) WIND ENERGY. D) NUCLEAR ENERGY. Show Answer Correct Answer: A) GEOTHERMAL. 5. If the lights are on, the circuit is A) Closed. B) Open. C) All the above. D) None of the above. Show Answer Correct Answer: A) Closed. 6. A wire connected to a power supplyof 230 V has power dissipation P$_{1}$.Suppose the wire is cut into two equalpieces and connected parallel to thesame power supply. In this case powerdissipation is P$_{2}$ . The ratio P$_{2}$/P$_{1}$is A) 1. B) 2. C) 3. D) 4. Show Answer Correct Answer: D) 4. 7. A natural fuel (coal, oil, or gas) formed in the geological past from the remains of living organisms. A) FUEL CELL. B) WIND ENERGY. C) SOLAR ENERGY. D) FOSSIL FUEL. Show Answer Correct Answer: D) FOSSIL FUEL. 8. The dimensions of mobility of charge carriers are A) [M$^{-2}$T$^{2}$A]. B) [M$^{-1}$T$^{2}$A]. C) [M$^{-1}$T$^{3}$A$^{-1}$]. D) [M$^{-1}$T$^{3}$A]. Show Answer Correct Answer: B) [M$^{-1}$T$^{2}$A]. 9. What is the term for the flow of charge in a circuit? A) Resistance. B) Current. C) Voltage. D) Power. Show Answer Correct Answer: B) Current. 10. Voltage is a form of: A) Kinetic energy. B) Potential energy. C) Both Potential and Kinetic energy. D) None of the above. Show Answer Correct Answer: B) Potential energy. 11. An example of a good conductor is A) Copper. B) Sand. C) Plastic. D) None of the above. Show Answer Correct Answer: A) Copper. 12. What electrical charge to electrons carry? A) Positive. B) Negative. C) Neutral. D) None of the above. Show Answer Correct Answer: B) Negative. 13. Resistance of conductor depends on its A) Length. B) Area of cross section. C) Nature of material. D) All of these. Show Answer Correct Answer: D) All of these. 14. Wheatstone is one type of ..... bridge A) AC. B) DC. C) DAC. D) ADC. Show Answer Correct Answer: B) DC. 15. 8 identical cells, each of emf E and internal resistance r, are connected in series.If polarity of two cell is reversed, the total internal resistance in the circuit wil be A) 8r. B) 6r. C) 4r. D) 2r. Show Answer Correct Answer: A) 8r. 16. In a metre bridge experiment, resistance box (withR = 2ohm) is connected in the left gap andthe unknown resistance S in the right gap. If balancing length be 40 cm, calculate value of S. A) 2 ohm. B) 3 ohm. C) 4 ohm. D) 2.5 ohm. Show Answer Correct Answer: B) 3 ohm. 17. A wire of length L is drawn such that its diameter is reduced to half of its original diameter. If the resistance of the wire were 10 ohm, its new resistance would be. A) 40 ohm. B) 60 ohm. C) 120 ohm. D) 160 ohm. Show Answer Correct Answer: D) 160 ohm. 18. If voltage is decreased, current will ..... A) Increase. B) Decrease. C) Stay the same. D) None of the above. Show Answer Correct Answer: B) Decrease. 19. What is the unit of specific resistance? A) Ohm x meter. B) Volt x meter. C) Ampere x meter. D) Watt x meter. Show Answer Correct Answer: A) Ohm x meter. 20. If the charge is 60 Coulombs and the time is 15 seconds, what is the current? A) 75 Amps. B) 45 Amps. C) 15 Amps. D) 4 Amps. Show Answer Correct Answer: D) 4 Amps. 21. The most energy efficient option is A) CFL lights. B) LED lights. C) Ordinary lights. D) None of the above. Show Answer Correct Answer: B) LED lights. 22. What is the effect of increasing the resistance in a circuit on the current flow, assuming the voltage remains constant? A) The current flow increases. B) The current flow decreases. C) The current flow remains the same. D) The current flow becomes zero. Show Answer Correct Answer: B) The current flow decreases. 23. If one of the resistors in a parallel circuit is removed, the total resistance will be A) Zero. B) Decreases. C) Increases. D) Constant. Show Answer Correct Answer: C) Increases. 24. What happends to potential as it pass through a bulb A) It increase the potential. B) The potential lose a bit of charge. C) Potential loses all of the charge. D) Nothing happend. Show Answer Correct Answer: B) The potential lose a bit of charge. 25. Charge carriers in metals are A) Holes. B) Free electrons. C) Ions. D) Protons. Show Answer Correct Answer: B) Free electrons. ← 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