This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Physics (Part I) Chapter 3 Current Electricity – Quiz 11 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 11 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. When electricity flows-a current is moving A) Static electricity. B) Parallel circuit. C) Current-electricity. D) Dishcharge. Show Answer Correct Answer: C) Current-electricity. 2. A material that does not allow electricity flow easily A) Conductor. B) Resistor. C) Fuse. D) Insulator. Show Answer Correct Answer: D) Insulator. 3. Three electric bulbs of rating 60 W/each are joined in series and then connected to electric mains. The power consumed by these three bulbs will be A) 180 W. B) 60 W. C) 20 W. D) (20/3) W. Show Answer Correct Answer: C) 20 W. 4. If you rubbed two balloons with a piece of wool. What will happen when the balloons are brought near each other? A) The balloons will repel each other. B) The balloons will attract each other. C) The balloons will become positively (+) charged. D) The balloons will pop. Show Answer Correct Answer: A) The balloons will repel each other. 5. What do we use to open and close a circuit? A) Wires. B) Door. C) Magic. D) Switch. Show Answer Correct Answer: D) Switch. 6. When a 12 V battery is connected across an unknown resistor, there is a current 2.5 mA in the circuit. Find the value of resistance of the resistor. [Use V = IR] A) 1000 ohm. B) 2000 ohm. C) 4800 ohm. D) 6700 ohm. Show Answer Correct Answer: C) 4800 ohm. 7. What should you use to make an electromagnet? A) Battery, nail, string. B) Battery, pencil, wire. C) Battery, wire, iron core(nail). D) Battery, wire, permanent magnet. Show Answer Correct Answer: C) Battery, wire, iron core(nail). 8. For which of the following dependence of drift velocity V$_{d}$ on electric field E, Ohm's law is obeyed? A) $V_d\\propto E^2$. B) $V_d\\propto\sqrt{E}$. C) $V_d\\propto E^{ }$. D) $V_d\\propto E^0$. Show Answer Correct Answer: C) $V_d\\propto E^{ }$. 9. The average Thermal velocity of free electrons in a conductor is A) Zero. B) Non-zero. C) All the above. D) None of the above. Show Answer Correct Answer: A) Zero. 10. Two wires made of the same material have the same lengths but different diameters. They areconnected in parallel to a battery. The quantity that is NOT the same for the wires is: A) The end-to-end potential difference. B) The current. C) The current density. D) The electric field. Show Answer Correct Answer: B) The current. 11. What happens to the brightness of bulbs in a series circuit if more bulbs are added? A) The brightness increases. B) The brightness decreases. C) The brightness remains the same. D) The bulbs will not light up. Show Answer Correct Answer: B) The brightness decreases. 12. The measure of how difficult it is for electrons to move through a circuit, the brakes. A) Voltage. B) Current. C) Resistance. D) None of the above. Show Answer Correct Answer: C) Resistance. 13. When the switch is closed, the lights are ..... A) On. B) Off. C) All the above. D) None of the above. Show Answer Correct Answer: A) On. 14. According to Kirchhoff's voltage law, the algebraic some of all IR drops and e.m.fs. in any closed loop of a network is always A) Negative. B) Positive. C) Determined by battery e.m.fs. D) Zero. Show Answer Correct Answer: D) Zero. 15. Material, length, diameter, and temperature all determine the ..... of a wire. A) Resistance. B) Circuit. C) Volts. D) Amps. Show Answer Correct Answer: A) Resistance. 16. What happends to the circuit if resistance increase? A) The circuit increases in current and the bulbs become brighter. B) The circuit decreases in current and the bulbs become dimer. C) All the above. D) None of the above. Show Answer Correct Answer: B) The circuit decreases in current and the bulbs become dimer. 17. A circuit has more than one loop/path. When one light goes out, the others stay on. A) Closed circuit. B) Series circuit. C) Parallel circuit. D) Open circuit. Show Answer Correct Answer: C) Parallel circuit. 18. Which of the following best describes a magnetic field? A) A measure of the length of a magnet. B) The force that pushes two magnets away from each other. C) An invisible region that surrounds the north pole of a magnet. D) A region around a magnet in which you can measure magnetic forces. Show Answer Correct Answer: D) A region around a magnet in which you can measure magnetic forces. 19. A wire has resistance 12 ohm . It is bent in the form of a circle. The effective resistance between the two points on any diameter is equal to A) 12 ohm. B) 6 ohm. C) 3 ohm. D) 24 ohm. Show Answer Correct Answer: C) 3 ohm. 20. A 4.0 V potentiometer used for the determination of internal resistance of a 2.5 V cell. The balance point of the cell in open circuit is 96.3 cm. When a resistor of 12.5 $\Omega$ is used in the external circuit of the cell, the balance point shifts to 76.8 cm length of the potentiometer wire. Determine the internal resistance of the cell. A) 3.125 ohm. B) 2.125 ohm. C) 1.125 ohm. D) 0.125 ohm. Show Answer Correct Answer: A) 3.125 ohm. 21. How does alternating current differ from direct current? A) Alternating current produces more voltage than direct current. B) Alternating current always flows in the same direction; the direction of a direct current switches back and forth. C) Direct current produces more voltage than alternating current. D) Direct current always flows in the same direction; the direction of an alternating current switches back and forth. Show Answer Correct Answer: D) Direct current always flows in the same direction; the direction of an alternating current switches back and forth. 22. What is a common cause of static electricity? A) Rubbing two different materials together. B) Connecting a circuit to a power source. C) Using a transformer. D) Turning on a light switch. Show Answer Correct Answer: A) Rubbing two different materials together. 23. Where is the south pole of Earth's magnetic field? A) Exactly at the geographic South pole. B) Near the geographic South pole. C) Exactly at the geographic north pole. D) Near the geographic North pole. Show Answer Correct Answer: D) Near the geographic North pole. 24. Two students design a circuit that includes a switch, battery, and light bulb all directly connected by wires. Before flipping the switch, what could the students do to BEST ensure that it will work? A) Clean the wire. B) Check the brightness of the bulb. C) Reverse the direction of the wires. D) Make sure there is a complete path. Show Answer Correct Answer: D) Make sure there is a complete path. 25. Potential difference is another term for A) Current. B) Voltage. C) Energy. D) Power. Show Answer Correct Answer: B) Voltage. ← 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