This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Physics (Part I) Chapter 3 Current Electricity – Quiz 56 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 56 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A flow of 10$^{7 }$electrons per second in a conduction wire constitutes a current of A) 1.6 x 10$^{-26}$ A. B) 1.6 x 10$^{ 12}$ A. C) 1.6 x 10$^{-12}$ A. D) 1.6 x 10$^{ 26}$ A. Show Answer Correct Answer: C) 1.6 x 10$^{-12}$ A. 2. Two wires of the same material having equal area of cross section having length L and 2L. Their respective resistance are in the ratio A) 2:1. B) 1:1. C) 1:2. D) 1:3. Show Answer Correct Answer: C) 1:2. 3. Ammeter is used to measure ..... A) Voltage. B) Electric current. C) Resistance. D) Resistivity. Show Answer Correct Answer: B) Electric current. 4. Which part of a circuit could start and stop the flow of electric current? A) Battery. B) Light bulb. C) Wire. D) Switch. Show Answer Correct Answer: D) Switch. 5. What happens to the voltage before AC is used at home? A) It is increased. B) It is decreased. C) It remains the same. D) None of the above. Show Answer Correct Answer: B) It is decreased. 6. (a) is the best electrical conductor A) A. Copper Penny. B) Plastic Tubing. C) Glass Rod. D) Cotton String. Show Answer Correct Answer: A) A. Copper Penny. 7. When current flows through a junction of 2 dissimilar metals heat is evolved or absorbed at the junction. This process is called ..... A) Seebeck effect. B) Joule effect. C) Peltier effect. D) Thomson effect. Show Answer Correct Answer: C) Peltier effect. 8. A material in which electrons are not able to move easily is called ..... A) Circuit. B) Insulator. C) Resistance. D) Conductor. Show Answer Correct Answer: B) Insulator. 9. The small particles that travel through a circuit are called ..... A) Electrons. B) Dust. C) Wires. D) None of the above. Show Answer Correct Answer: A) Electrons. 10. There is ..... between like charges A) Repulsion. B) Attraction. C) All the above. D) None of the above. Show Answer Correct Answer: A) Repulsion. 11. What is the formula of voltage? A) V = W x Q. B) V = W / Q. C) W = V / Q. D) None of the above. Show Answer Correct Answer: B) V = W / Q. 12. With rise in temperature, the resistance of the semi conductors A) Increases. B) Decreases. C) Becomes zero. D) Remains same. Show Answer Correct Answer: B) Decreases. 13. How is voltage measured? A) With a voltmeter in the circuit. B) With a voltmeter across a load or battery. C) With an ammeter in the circuit. D) With an ammeter across a load or battery. Show Answer Correct Answer: B) With a voltmeter across a load or battery. 14. Identify the material commonly used for making coil of a resistance box A) Molybdenum. B) Manganese. C) Manganin. D) Magnesium. Show Answer Correct Answer: C) Manganin. 15. Why are electrical cords covered in plastic or rubber? A) Because plastic and rubber are insulators which keeps us safe. B) Because it looks nicer. C) Because plastic and wire help conduct electricity. D) Because wires are color coded based on voltage. Show Answer Correct Answer: A) Because plastic and rubber are insulators which keeps us safe. 16. One of the simplest applications of a Wheatstone bridge is ..... A) Power measurement. B) Current measurement. C) Light measurement. D) Voltage measurement. Show Answer Correct Answer: C) Light measurement. 17. ..... is the movement of electrons. A) Magnetism. B) Electricity. C) Electromagnetism. D) None of the above. Show Answer Correct Answer: B) Electricity. 18. What is the unit of electric current in the International System of Units (SI)? A) Ampere. B) Volt. C) Ohm. D) Coulomb. Show Answer Correct Answer: A) Ampere. 19. What is the effect of two negatively charged objects coming near 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: A) The objects repel each other. 20. Which one of this that are NOT basic component of simple circuit? A) Light bulb. B) Wire. C) Battery. D) Appliances. Show Answer Correct Answer: D) Appliances. 21. Which of the following would be a good conductor of electricity? A) Plastic. B) Rubber. C) Cotton. D) Iron. Show Answer Correct Answer: D) Iron. 22. Susan is making an electromagnet in her science class today. First, she takes a nail and winds coils of copper wire around it. Then, she connects the ends of the wire to a battery. She uses the electromagnet to pick up paper clips, but the paper clips drop when she disconnects the wires from the battery. Which kind of energy does Susan change into magnetic energy in this project? A) Chemical. B) Electrical. C) Heat. D) Light. Show Answer Correct Answer: B) Electrical. 23. Power is measured in what unit? A) Amps. B) Volts. C) Watts. D) Ohms. Show Answer Correct Answer: C) Watts. 24. Insulators provide ..... resistance so electrons cannot move easily. A) High. B) Low. C) All the above. D) None of the above. Show Answer Correct Answer: A) High. 25. How does resistivity depend on relaxation time? A) Directly. B) Inversely. C) Directly by its 4$^{th}$ power. D) None of the above. Show Answer Correct Answer: B) Inversely. ← 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