This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Physics (Part I) Chapter 3 Current Electricity – Quiz 5 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 5 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. In a computer, electric energy is transformed into all of the following except ..... energy. A) Kinetic (motion) energy. B) Thermal energy. C) Sound energy. D) Light energy. Show Answer Correct Answer: A) Kinetic (motion) energy. 2. What device transforms mechanical energy into electrical energy? A) Electric Motor. B) Generator. C) All the above. D) None of the above. Show Answer Correct Answer: B) Generator. 3. Two identical conductors maintained at same temperatures are given potential differences in the ratio 1:2. Then the ratio of their drift velocities is A) 1:2. B) 3:2. C) 1:1. D) 1:4. Show Answer Correct Answer: A) 1:2. 4. What is the formula for calculating the total resistance of resistors in parallel? A) 1/R = 1/R1 + 1/R2. B) R = R1 * R2. C) R = R1-R2. D) R = R1 + R2 + R3. Show Answer Correct Answer: A) 1/R = 1/R1 + 1/R2. 5. In a series cricuit, a battry has 12 volts, and there are two bulbs, what are the amount of volts in each lightbulb? A) Each bulb has-9 volts. B) Each one has-6 volts. C) Each one has 6 volts. D) One bulb as 3 volts while another has 9 volts. Show Answer Correct Answer: B) Each one has-6 volts. 6. Shorter wire creates ..... resistance. A) More. B) Less. C) No change in. D) None of the above. Show Answer Correct Answer: B) Less. 7. What is the minimum resistance which can be made using five resistors each of 1/5 ohm? A) 1/5 ohm. B) 1/2.5 ohm. C) 1/10 ohm. D) 1/25 ohm. Show Answer Correct Answer: D) 1/25 ohm. 8. SI unit of electric charge is A) Joule. B) Volt. C) Ampere. D) Coulomb. Show Answer Correct Answer: D) Coulomb. 9. An electric iron box rated 750 W Operated for 2 hours per day, if the cost of unit Is Rs 3.00 per kWh, then the cost of energy used to operate electric iron box for 30 days is A) Rs 125. B) Rs 308. C) Rs 135. D) Rs 185. Show Answer Correct Answer: C) Rs 135. 10. The positive temperature co efficient of resistance is for A) Wood. B) Germanium. C) An electrolyte. D) Copper. Show Answer Correct Answer: D) Copper. 11. In a simple circuit, if the resistance is doubled, what happens to the current? A) It doubles. B) It halves. C) It remains the same. D) It becomes zero. Show Answer Correct Answer: B) It halves. 12. A student tests an unknown substance that she believes to be a metal. Which of the following observations would indicate that the unknown substance is a metal? A) It is a good conductor of electricity. B) It can break easily and is very brittle. C) It can easily float in water. D) It is brown and dull. Show Answer Correct Answer: A) It is a good conductor of electricity. 13. In a series circuit, which of the following will vary based on the resistor? A) Power. B) Voltage. C) Current. D) None of the above. Show Answer Correct Answer: B) Voltage. 14. For electricity to flow, what do you need? A) Only a battery. B) Only a battery and a light bulb. C) Only a battery, light bulb and wire. D) A battery, light bulb and wire in a closed circuit. Show Answer Correct Answer: D) A battery, light bulb and wire in a closed circuit. 15. What is the basic property of electrical conducting materials? A) Reverses the direction of current in the materials. B) Leaks the current through the materials. C) Blocks the passage of current through the materials. D) Allows the passage of current through the materials. Show Answer Correct Answer: D) Allows the passage of current through the materials. 16. Which is the unit of measure for current? A) Amp. B) Volt. C) Coulomb. D) Joule. Show Answer Correct Answer: A) Amp. 17. A 10 m long wire of resistance 15 ohm is connected in series with a battery of emf 2V (no internal resistance) and a resistance of 5 ohm. The potential gradient along the wire is: ..... A) 0.15 Vm$^{-1}$. B) 0.45 Vm$^{-1}$. C) 1.5 Vm$^{-1}$. D) 4.5 Vm$^{-1}$. Show Answer Correct Answer: A) 0.15 Vm$^{-1}$. 18. If voltage applied on a capacitor is increased from V to 2 V A) Q remains same, C doubled. B) Q is doubled, C doubled. C) C remains same, Q doubled. D) None of the above. Show Answer Correct Answer: C) C remains same, Q doubled. 19. Meaning of Current A) Flow. B) Latest. C) Ongoing. D) All the above. Show Answer Correct Answer: D) All the above. 20. "The sum of all voltage drops in a series circuit equals the total applied voltage." This is know as what? A) Ohm's Law. B) Kirchhoff's Voltage Law. C) Kirchhoff's Current Law. D) Bolen's Law. Show Answer Correct Answer: B) Kirchhoff's Voltage Law. 21. Kirchoff's Second Law for the electric network is based on A) Law of conservation of charge. B) Law of conservation of energy. C) Law of conservation of angular momentum. D) Law of conservation of mass. Show Answer Correct Answer: B) Law of conservation of energy. 22. In a network maximum power transfer occurs when ..... A) R$_{Th}$= R$_{L}$. B) R$_{Th}$/R$_{L}$ =0. C) R$_{Th}$=-R$_{L}$. D) R$_{Th}$+R$_{L}$= 1. Show Answer Correct Answer: A) R$_{Th}$= R$_{L}$. 23. A wire has resistance of 12 ohms is bent to form a square.The resistance between the two diagonal points would be A) 12 ohms. B) 24 ohms. C) 6 ohms. D) 3 ohms. Show Answer Correct Answer: D) 3 ohms. 24. Among the following which gives current due to its flow? A) Atom. B) Electron. C) Proton. D) Neutron. Show Answer Correct Answer: B) Electron. 25. A student kept her 60-watt, 120-volt study lamp turned on from 2:00 PM until 2:00 AM. How many coulombs of charge went through it? A) 21, 600. B) 18, 000. C) 3, 600. D) 7, 200. Show Answer Correct Answer: A) 21, 600. ← 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 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 10Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books