This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Physics (Part I) Chapter 3 Current Electricity – Quiz 6 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 6 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which poles on the earth change? A) The North and South. B) The magnetic poles. C) The geographic poles. D) The telephone poles. Show Answer Correct Answer: B) The magnetic poles. 2. An open circuit is broken and ..... electrons to flow. A) Allows. B) Does not allow. C) All the above. D) None of the above. Show Answer Correct Answer: B) Does not allow. 3. In the experiment of potentiometer, at the balanced point there is no current in A) In main circuit. B) Galvanometer circuit. C) Potentiometer circuit. D) Both main and galvanometer circuit. Show Answer Correct Answer: C) Potentiometer circuit. 4. Voltage is measured in ..... A) Volts. B) Watts. C) Coulombs. D) None of the above. Show Answer Correct Answer: A) Volts. 5. What is Ohm's Law formula? A) V = I * R. B) R = V-I. C) I = V + R. D) V = R / I. Show Answer Correct Answer: A) V = I * R. 6. All permanent magnets have two A) Magnetic charges. B) Magnetic fields. C) Magnetic needles. D) Magnetic poles. Show Answer Correct Answer: D) Magnetic poles. 7. How does current behave in a series circuit? A) It divides equally among all components. B) It only flows through the first component. C) It remains the same through all components. D) It varies from one component to another. Show Answer Correct Answer: C) It remains the same through all components. 8. In a circuit, what is the purpose of the switch? A) To control the brightness of the light bulb. B) To control the flow of energy through the circuit. C) To prevent energy from going the wrong direction. D) To prevent extra energy from building up in the circuit. Show Answer Correct Answer: B) To control the flow of energy through the circuit. 9. Involves circuits A) Static Electricity. B) Current Electricity. C) All the above. D) None of the above. Show Answer Correct Answer: B) Current Electricity. 10. Which of the following factor is affecting, the resistivity of a conductor? A) Nature. B) Area. C) Length. D) None of the above. Show Answer Correct Answer: A) Nature. 11. The opposition to electron movement A) Voltage. B) Static electricity. C) Current. D) Resistance. Show Answer Correct Answer: D) Resistance. 12. Kirchhoff's second law is in accordance with law of conservation of ..... A) Current. B) Charge. C) Energy. D) None of the above. Show Answer Correct Answer: C) Energy. 13. To reverse current direction in a motor the conducted current goes A) Through the commutator to the armature. B) Through the armature. C) Through the brushes to the commutator. D) In the direction of rotation. Show Answer Correct Answer: C) Through the brushes to the commutator. 14. Which component is used to store electrical energy in a circuit? A) Resistor. B) Capacitor. C) Inductor. D) Diode. Show Answer Correct Answer: B) Capacitor. 15. Five cylindrical wires are made of the same material. Their lengths and radii are:wire 1:length f, radius rwire 2:length f/4, radius r/2wire 3:length f/2, radius r/2wire 4:length f, radius r/2wire 5:length 5f, radius 2rRank the wires according to their resistances, least to greatest. A) 1, 2, 3, 4, 5. B) 5, 4, 3, 2, 1. C) 1 and 2 tie, then 5, 3, 4. D) 1, 3, 4, 2, 5. Show Answer Correct Answer: C) 1 and 2 tie, then 5, 3, 4. 16. What is the rate of flow of electric charges called? A) Electric potential. B) Electric conductance. C) Electric current. D) None of these. Show Answer Correct Answer: C) Electric current. 17. What does the voltage on a battery mean? A) The speed of electron flow through it. B) How tough it is for electrons to flow through it. C) The amount of energy given to the electrons. D) The amount of energy taken away from the electrons. Show Answer Correct Answer: C) The amount of energy given to the electrons. 18. A uniform wire has resistance 24 ohm. It is bent in the form of a circle. The effective resistance between the two end points on any diameter of the circle is ..... ohm. A) 12. B) 24. C) 6. D) 3. Show Answer Correct Answer: C) 6. 19. There is ..... when opposite electric charges come near to each other. A) Repulsion. B) Attraction. C) All the above. D) None of the above. Show Answer Correct Answer: B) Attraction. 20. What is the unit of resistivity? A) Ohm-m$^{-1}$. B) Ohm$^{-1}$m. C) Ohm-m. D) No unit. Show Answer Correct Answer: C) Ohm-m. 21. A series circuit has A) Only one path for the electric charges to follow. B) Multiple paths for the electric charges to follow. C) All the above. D) None of the above. Show Answer Correct Answer: A) Only one path for the electric charges to follow. 22. A wire is broken in four equal parts. A circuit is formed by keeping the four wires together in parallel combination. The resistance of the packet in comparison to the resistance of the wire will be A) Equal. B) (1/4)th. C) (1/8)th. D) (1/16)th. Show Answer Correct Answer: B) (1/4)th. 23. If you decrease the voltage of a series circuit, what happens? A) Current decreases. B) Current increases. C) Electrons disappear. D) Bulbs get brighter. Show Answer Correct Answer: A) Current decreases. 24. If a compass is placed near an electromagnet what would happen if the switch is closed? A) The compass will do nothing. B) The compass needle will turn. C) A spark will jump from the nail. D) The wire will become an insulator. Show Answer Correct Answer: B) The compass needle will turn. 25. If you add a second battery to your series circuit, what will happen to the current in your circuit? A) Decrease. B) Increase. C) Stay the same. D) Disappears. Show Answer Correct Answer: B) Increase. ← 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 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