This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Physics (Part I) Chapter 3 Current Electricity – Quiz 34 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 34 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. If two magnetic South poles are brought near each other, what would the magnetic field lines look like? A) The lines would connect between the poles. B) The lines would move out, but then curve away from each other. C) The lines would curve like an "S". D) Since South poles repel, there would not be any lines. Show Answer Correct Answer: B) The lines would move out, but then curve away from each other. 2. Accumulation of electrical charges on the surface of an object A) Static Electricity. B) Current Electricity. C) All the above. D) None of the above. Show Answer Correct Answer: A) Static Electricity. 3. What does a generator do? A) Move electricity from place to place. B) Increase or decrease the voltage of the electricity. C) Change mechanical energy into electrical energy. D) None of the above. Show Answer Correct Answer: C) Change mechanical energy into electrical energy. 4. Two copper wires have the same cross-sectional area but have different lengths. Wire X has a length L and wire Y has a length 2L. The ratio between the resistance of wire Y and wire X is: A) 1:4. B) 1:2. C) 2:1. D) 4:1. Show Answer Correct Answer: C) 2:1. 5. What is a kilo equal to? A) 100. B) 1, 000. C) 100, 000. D) 1, 000, 000. Show Answer Correct Answer: B) 1, 000. 6. What specifically does resistance reduce the flow of? A) Current. B) Voltage. C) Electricity. D) None of the above. Show Answer Correct Answer: A) Current. 7. As temperature decreases what happens to the resistance of copper and germanium? A) Both remains the same. B) Resistance of copper decreases whereas resistance of Germanium increases. C) Resistance of copper increases whereas resistance of Germanium decreases. D) For both resistance is decreased. Show Answer Correct Answer: B) Resistance of copper decreases whereas resistance of Germanium increases. 8. A flow of electric charge A) Static electricity. B) Electrical field. C) Electric current. D) Electrical charge. Show Answer Correct Answer: C) Electric current. 9. A light circuit is operating at 75 Volts. What is the circuit's current if the resistance is 5 Ohms? A) 375 Amps. B) 50 Amps. C) 15 Amps. D) 0.07 Amps. Show Answer Correct Answer: C) 15 Amps. 10. Electric current DOES NOT flow in A) An open circuit. B) A closed circuit. C) An electromagnet. D) A complete circuit. Show Answer Correct Answer: A) An open circuit. 11. Which of the following are sources of mechanical energy? A) Cars and trucks. B) Radios and televisions. C) Transmission lines and transformers. D) Wind and fossil fuels. Show Answer Correct Answer: D) Wind and fossil fuels. 12. What type of device converts electrical energy into mechanical energy A) Electric motors. B) Generator. C) Transformers. D) Galvanometer. Show Answer Correct Answer: A) Electric motors. 13. An object becomes positively charged by A) Losing protons. B) Gaining electrons. C) Losing electrons. D) Gaining protons. Show Answer Correct Answer: C) Losing electrons. 14. Which of the following statements is the only correct statement for a potentiometer? A) It cannot measure potential difference. B) It cannot measure the capacitance of a capacitor. C) It cannot measure current. D) It cannot measure resistance. Show Answer Correct Answer: B) It cannot measure the capacitance of a capacitor. 15. Which device is used to measure current electricity? A) Voltmeter. B) Ammeter. C) Thermometer. D) Barometer. Show Answer Correct Answer: B) Ammeter. 16. What is the reciprocal of resistance called? A) Conductance. B) Current. C) Potential difference. D) Charge. Show Answer Correct Answer: A) Conductance. 17. If a material does not allow charges to move through it easily, what is it called? A) An electrical insulator. B) An electrical conductor. C) A resistor. D) A capacitor. Show Answer Correct Answer: A) An electrical insulator. 18. Current in a conductor is due to A) Ions. B) Protons. C) Electrons. D) Both ions and electrons. Show Answer Correct Answer: C) Electrons. 19. A wire of 10ohm resistance is stretched to thrice its original length . Calculate the new resistance A) 3 ohm. B) 9 ohm. C) 90 ohm. D) No change. Show Answer Correct Answer: C) 90 ohm. 20. What is the primary difference between static and current electricity? A) Static electricity involves stationary charges, while current electricity involves moving charges. B) Static electricity is used in batteries, while current electricity is used in power lines. C) Static electricity is a form of renewable energy, while current electricity is not. D) Static electricity is always dangerous, while current electricity is always safe. Show Answer Correct Answer: A) Static electricity involves stationary charges, while current electricity involves moving charges. 21. Which of the following scenarios best illustrates the concept of current electricity? A) A person receiving a shock after walking on a carpet. B) A light bulb glowing when connected to a battery. C) A balloon sticking to a sweater after being rubbed. D) Hair standing on end after removing a hat. Show Answer Correct Answer: B) A light bulb glowing when connected to a battery. 22. Find the current through a wire of resistance 2 ohm which is connected to a supply of 100 V? A) 200 A. B) 100 A. C) 50 A. D) 2 A. Show Answer Correct Answer: C) 50 A. 23. Magnetism created by an electric current A) Electricity. B) Electromagnetism. C) Wind energy. D) None of the above. Show Answer Correct Answer: B) Electromagnetism. 24. Wires A and B are made from the same material. Wire A has a resistance of $48\Omega$ A) 12 $\Omega$. B) 24 $\Omega$. C) 48 $\Omega$. D) 96 $\Omega$. Show Answer Correct Answer: B) 24 $\Omega$. 25. What type of device converts mechanical energy into electrical energy? A) Solenoid. B) Electric motor. C) Transformer. D) Generator. Show Answer Correct Answer: D) Generator. ← 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