This quiz works best with JavaScript enabled. Home > Cbse > Class 12 > Science > Physics Part I > Class 12 Physics (Part I) Chapter 3 Current Electricity – Quiz 23 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 23 (26 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. When current flows through a junction of 2 dissimilar metals heat is evolved or absorbed at the junction. This process is called ..... A) Thomson effect. B) Joule effect. C) Seebeck effect. D) Peltier effect. Show Answer Correct Answer: D) Peltier effect. 2. A material in which electrons are not able to move easily is called ..... A) Resistance. B) Conductor. C) Insulator. D) Circuit. Show Answer Correct Answer: C) Insulator. 3. 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. 4. There is ..... between like charges A) Repulsion. B) Attraction. C) All the above. D) None of the above. Show Answer Correct Answer: A) Repulsion. 5. 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. 6. With rise in temperature, the resistance of the semi conductors A) Decreases. B) Becomes zero. C) Remains same. D) Increases. Show Answer Correct Answer: A) Decreases. 7. Identify the material commonly used for making coil of a resistance box A) Molybdenum. B) Manganin. C) Manganese. D) Magnesium. Show Answer Correct Answer: B) Manganin. 8. 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. 9. One of the simplest applications of a Wheatstone bridge is ..... A) Current measurement. B) Voltage measurement. C) Power measurement. D) Light measurement. Show Answer Correct Answer: D) Light measurement. 10. ..... is the movement of electrons. A) Magnetism. B) Electricity. C) Electromagnetism. D) None of the above. Show Answer Correct Answer: B) Electricity. 11. What is the unit of electric current in the International System of Units (SI)? A) Volt. B) Coulomb. C) Ohm. D) Ampere. Show Answer Correct Answer: D) Ampere. 12. 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. 13. Which one of this that are NOT basic component of simple circuit? A) Appliances. B) Battery. C) Wire. D) Light bulb. Show Answer Correct Answer: A) Appliances. 14. Which of the following would be a good conductor of electricity? A) Cotton. B) Rubber. C) Iron. D) Plastic. Show Answer Correct Answer: C) Iron. 15. 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) Heat. B) Electrical. C) Chemical. D) Light. Show Answer Correct Answer: B) Electrical. 16. 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. 17. 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. 18. The solution which conducts electricity is known as ..... A) Conductor. B) Electrolyte. C) Insulator. D) None. Show Answer Correct Answer: B) Electrolyte. 19. In the measurement of resistance by a meter-bridge, the current is necessarily reversed through the bridge wire to eliminate A) End error. B) Index error. C) Error due to electric effect. D) Random errors. Show Answer Correct Answer: C) Error due to electric effect. 20. How do you calculate the total voltage in a series circuit? A) V total = V1-V2-V3 Vn. B) V total = V1 * V2 * V3 * * Vn. C) V total = V1 / V2 / V3 / / Vn. D) V total = V1 + V2 + V3 + + Vn. Show Answer Correct Answer: D) V total = V1 + V2 + V3 + + Vn. 21. A ..... limits the flow of electricity A) Resistor. B) Conductor. C) Circuit. D) None of the above. Show Answer Correct Answer: A) Resistor. 22. Turning on the light creates a ..... path. A) Broken. B) Continuous. C) All the above. D) None of the above. Show Answer Correct Answer: B) Continuous. 23. A carbon resistance is having a following coding:green, orange, black, gold.The resistance of the resistor is A) 53 x10$^{0}$+10%. B) 53 x10$^{1}$+5%. C) 53 x10+10%. D) 53 x10$^{0}$+5%. Show Answer Correct Answer: D) 53 x10$^{0}$+5%. 24. A copper wire is connected across the terminals of battery of e.m.f. 9.0 V.If 30 C takes 150 s to complete the circuit, calculate the current flow. A) 0.20 A. B) 5.0 A. C) 4500 A. D) None of the above. Show Answer Correct Answer: A) 0.20 A. 25. What is the formula for calculating potential difference? A) V = W/Q. B) V = Q/W. C) V = I/R. D) V = IR. Show Answer Correct Answer: A) V = W/Q. 26. It is better to send 10, 000 kW of electric power long distances at 10, 000 V rather than at 220 Vbecause: A) The resistance of the wires is less at high voltages. B) There is less heating in the transmission wires. C) The insulation is more effective at high voltages. D) More current is transmitted at high voltages. Show Answer Correct Answer: B) There is less heating in the transmission wires. ← PreviousRelated QuizzesScience QuizzesClass 12 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 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books