This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Physics (Part I) Chapter 3 Current Electricity – Quiz 33 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 33 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Secondary cell is a ..... chemical cell. A) Reversible. B) Irreversible. C) Both A. and B. D) None of these. Show Answer Correct Answer: A) Reversible. 2. In a simple circuit, if the resistance is doubled while the voltage remains constant, 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. 3. Which of the following is a part of the atom? A) Protons. B) Electrodes. C) Circuit. D) Current. Show Answer Correct Answer: A) Protons. 4. The slope of the graph showing the variation of potential difference V on X-axis and current on Y-axis gives conductor's A) Resistance. B) Resistivity. C) Reciprocal of resistance. D) Conductivity. Show Answer Correct Answer: C) Reciprocal of resistance. 5. If 300C of charge flows through the cross section of a wire in one minute, the current flowing through the wire is A) 30A. B) 10A. C) 300 A. D) 5A. Show Answer Correct Answer: D) 5A. 6. How can you increase the total current in a parallel circuit? A) Add more parallel branches with resistive loads. B) Disconnect one of the existing branches. C) Increase the voltage across the circuit. D) Replace all resistive loads with capacitive loads. Show Answer Correct Answer: A) Add more parallel branches with resistive loads. 7. Which of the following formula is correct? A) R = V/I. B) R = I/V. C) R = VI. D) R = VI$^{2}$. Show Answer Correct Answer: A) R = V/I. 8. When no current is flowing through a conductor then A) All free electrons are moving in such a way, so that average speed is zero. B) All free electrons in conductor are in rest. C) Average thermal velocity of free electrons is zero. D) All of these. Show Answer Correct Answer: C) Average thermal velocity of free electrons is zero. 9. How does the capacitance of a capacitor change with the area of the plates? A) The capacitance remains constant regardless of the area of the plates. B) The capacitance decreases with the area of the plates. C) The capacitance increases with the area of the plates. D) The capacitance is only affected by the distance between the plates. Show Answer Correct Answer: C) The capacitance increases with the area of the plates. 10. How does electricity get to our houses? A) Through wireless transmission. B) Through power lines and transformers. C) Through solar panels directly. D) None of the above. Show Answer Correct Answer: B) Through power lines and transformers. 11. What is the effect of increasing the area of cross-section of a conductor on its resistance? A) Doubles resistance. B) No effect. C) Decreases resistance. D) Increases resistance. Show Answer Correct Answer: C) Decreases resistance. 12. A bulb in Sara's kitchen has blown up. Immediately all bulbs in Sara's house stopped working. The circuit in Sara's house is most probably ..... A) A series circuit. B) Over used. C) A parallel circuit. D) Very old. Show Answer Correct Answer: A) A series circuit. 13. A 8 volt battery supplies voltage to 4 bulbs. How much voltage would each bulb get? A) 8 volts. B) 2 volts. C) All the above. D) None of the above. Show Answer Correct Answer: B) 2 volts. 14. Potential difference between the terminals of a cell in an open circuit is, A) Potential difference. B) Terminal potential difference. C) Emf. D) None of the above. Show Answer Correct Answer: C) Emf. 15. The heat produced per unit time, on passing electric current through a conductor at a given temperature, is directly proportional to the ..... A) Square of electric current. B) Electric current. C) Reciprocal of electric current. D) Reciprocal of square of electric current. Show Answer Correct Answer: A) Square of electric current. 16. A circuit with 3 resistors, 20 Ohms, 10 Ohms, and 20 Ohms are in series. What is the total resistance? A) 43 Ohms. B) 50 Ohms. C) 60 Ohms. D) 33 Ohms. Show Answer Correct Answer: B) 50 Ohms. 17. A 6 V battery is connected to the terminals of a 3 m long wire of uniform thickness and resistance of 100 ohm. The difference of potential between two points on the wire separated by a distance of 50 cm will be ..... V. A) 2. B) 3. C) 1. D) 1.5. Show Answer Correct Answer: C) 1. 18. A plant generating electric current A) Transmits alternating current at high voltages, but is used at low voltages. B) Transmits direct current at high voltages, but is used at low voltages. C) Transmits alternating current at low voltages, but used at high voltages. D) Transmits direct current at low voltages, but used at high voltages. Show Answer Correct Answer: A) Transmits alternating current at high voltages, but is used at low voltages. 19. When you turn the television off you have ..... the circuit. A) Opened. B) Closed. C) All the above. D) None of the above. Show Answer Correct Answer: A) Opened. 20. When the switch is closed, the light A) Comes on. B) Stays off. C) Burns out. D) None of the above. Show Answer Correct Answer: A) Comes on. 21. Which of these will the south pole of a bar magnet repel? A) A paper clip. B) The south pole of another magnet. C) The north pole of another magnet. D) An iron nail. Show Answer Correct Answer: B) The south pole of another magnet. 22. Nichrome or manganin is widely used in wire bound standard resistors because of its A) Temperature independent resistivity. B) Very weakly temperature dependent resistivity. C) Strong dependence of resistivity with temperature. D) Mechanical strength. Show Answer Correct Answer: B) Very weakly temperature dependent resistivity. 23. Fill in the blank:Built up static charge can be attracted and jump to other objects. In doing so, it may create a small spark. This is known as a(n) electrical ..... A) Proton. B) Circuit. C) Friction. D) Discharge. E) Repulsion. Show Answer Correct Answer: D) Discharge. 24. What type of cell is necessary to make solar cells practical? A) Primary cells. B) Storage cells. C) None exist that can hold that much energy. D) None of the above. Show Answer Correct Answer: B) Storage cells. 25. Water in the waterfall flows from a higher level to the lower level because of ..... A) Water is Light. B) Gravitional force. C) Electrical force. D) Magnetic force. Show Answer Correct Answer: B) Gravitional force. ← 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