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 5 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 5 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A material that does not allow electricity flow easily A) Conductor. B) Fuse. C) Resistor. D) Insulator. Show Answer Correct Answer: D) Insulator. 2. 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) 20 W. C) 60 W. D) (20/3) W. Show Answer Correct Answer: B) 20 W. 3. 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. 4. What do we use to open and close a circuit? A) Door. B) Magic. C) Switch. D) Wires. Show Answer Correct Answer: C) Switch. 5. 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) 6700 ohm. B) 1000 ohm. C) 2000 ohm. D) 4800 ohm. Show Answer Correct Answer: D) 4800 ohm. 6. What should you use to make an electromagnet? A) Battery, wire, permanent magnet. B) Battery, wire, iron core(nail). C) Battery, nail, string. D) Battery, pencil, wire. Show Answer Correct Answer: B) Battery, wire, iron core(nail). 7. For which of the following dependence of drift velocity V$_{d}$ on electric field E, Ohm's law is obeyed? A) $V_d\\propto E^{ }$. B) $V_d\\propto\sqrt{E}$. C) $V_d\\propto E^0$. D) $V_d\\propto E^2$. Show Answer Correct Answer: A) $V_d\\propto E^{ }$. 8. 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. 9. 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 current. B) The electric field. C) The end-to-end potential difference. D) The current density. Show Answer Correct Answer: A) The current. 10. What happens to the brightness of bulbs in a series circuit if more bulbs are added? A) The brightness remains the same. B) The bulbs will not light up. C) The brightness increases. D) The brightness decreases. Show Answer Correct Answer: D) The brightness decreases. 11. 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. 12. 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. 13. 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) Zero. B) Positive. C) Determined by battery e.m.fs. D) Negative. Show Answer Correct Answer: A) Zero. 14. Material, length, diameter, and temperature all determine the ..... of a wire. A) Resistance. B) Volts. C) Amps. D) Circuit. Show Answer Correct Answer: A) Resistance. 15. 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. 16. 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. 17. Which of the following best describes a magnetic field? A) The force that pushes two magnets away from each other. B) A region around a magnet in which you can measure magnetic forces. C) A measure of the length of a magnet. D) An invisible region that surrounds the north pole of a magnet. Show Answer Correct Answer: B) A region around a magnet in which you can measure magnetic forces. 18. 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) 24 ohm. B) 6 ohm. C) 12 ohm. D) 3 ohm. Show Answer Correct Answer: D) 3 ohm. 19. 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. 20. 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. 21. What is a common cause of static electricity? A) Using a transformer. B) Rubbing two different materials together. C) Turning on a light switch. D) Connecting a circuit to a power source. Show Answer Correct Answer: B) Rubbing two different materials together. 22. Where is the south pole of Earth's magnetic field? A) Near the geographic North pole. B) Near the geographic South pole. C) Exactly at the geographic South pole. D) Exactly at the geographic north pole. Show Answer Correct Answer: A) Near the geographic North pole. 23. 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) Make sure there is a complete path. B) Check the brightness of the bulb. C) Clean the wire. D) Reverse the direction of the wires. Show Answer Correct Answer: A) Make sure there is a complete path. 24. Potential difference is another term for A) Current. B) Energy. C) Power. D) Voltage. Show Answer Correct Answer: D) Voltage. 25. Which is an example of static dischage? A) Thunder. B) Lightning. C) Insulators. D) A motor. Show Answer Correct Answer: B) Lightning. 26. This is a complete circuit where everything is connected A) Closed circuit. B) Insulator. C) Open circuit. D) Conductor. Show Answer Correct Answer: A) Closed circuit. 27. When a body has a deficit of n electrons it has A) + ne C. B) -ne C. C) Neutral. D) Cannot predict. Show Answer Correct Answer: A) + ne C. 28. A closed circuit is complete and ..... electrons to flow. A) Allows. B) Does not allow. C) All the above. D) None of the above. Show Answer Correct Answer: A) Allows. 29. A balloon sticks to a wall after being rubbed on hair. This is an example of: A) Current electricity. B) Magnetic force. C) Static electricity. D) Gravitational force. Show Answer Correct Answer: C) Static electricity. 30. The expression for heat energy dissipated, in a current flowing conductor is ..... A) H = I R $t^2$. B) H = I $R^2$. C) H = $I^2$. D) None of the above. Show Answer Correct Answer: C) H = $I^2$. 31. How many volts of electricity comes through a typical wall outlet in your home? A) 10, 000 volts. B) 9 volts. C) 120 volts. D) 60, 000 volts. Show Answer Correct Answer: C) 120 volts. 32. What is the unit for current? A) Amperes. B) Voltage. C) Ohm's. D) Coulomb's. Show Answer Correct Answer: A) Amperes. 33. A portable radio connected to a 9.0 V battery draws a current of 25 A. What is the resistance of the radio? A) 3.6$\Omega$. B) 0.036$\Omega$. C) 36$\Omega$. D) 0.36$\Omega$. Show Answer Correct Answer: D) 0.36$\Omega$. 34. Which device controls the current in the circuit? A) Ammeter. B) Voltmetre. C) Resistance. D) Galvanometer. Show Answer Correct Answer: C) Resistance. 35. ..... wire creates more resistance. A) Thicker. B) Thinner. C) All the above. D) None of the above. Show Answer Correct Answer: B) Thinner. 36. In India electricity is supplied for domestic use at 220 V. It is supplied at 110 V in USA. If the resistance of a 60 W bulb for use in India is R, the resistance of the same bulb in USA will be A) R/2. B) R/4. C) R. D) 2R. Show Answer Correct Answer: B) R/4. 37. If a current of 10 amperes flows through a 230 volt lamp, what is its resistance? A) 2300 ohms. B) 23 ohms. C) 23 ohms. D) None of the above. Show Answer Correct Answer: B) 23 ohms. 38. Which of the following electrical meter has the smallest resistance? A) Galvanometer. B) Milliammeter. C) Ammeter. D) Voltmeter. Show Answer Correct Answer: C) Ammeter. 39. The maximum electric field that a dielectric medium can withstand without breakdown is called A) Permittivity. B) Dielectric constant. C) Dielectric strength. D) None of the above. Show Answer Correct Answer: C) Dielectric strength. 40. When a current is passed in conductor, 3 $^{0}$C rise in temprature is observed. If the strength ofcurrent is made thrice, then rise in the temprature will approximtley be A) 9$^{o}$C. B) 18$^{o}$C. C) 27$^{o}$C. D) 36$^{o}$C. Show Answer Correct Answer: C) 27$^{o}$C. 41. Static electricity is: A) Electricity flowing in a wire. B) The buildup of electric charges on an object. C) When protons move between objects. D) None of the above. Show Answer Correct Answer: B) The buildup of electric charges on an object. 42. In an incomplete circuit, the light bulb would be lit. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 43. When is the Wheatstone bridge is most sensitive? A) When all the four resistances of the bridge are equal. B) When the bridge is balanced. C) When high amount of current is flowing through the bridge. D) When a very low amount of current is flowing through the bridge. Show Answer Correct Answer: A) When all the four resistances of the bridge are equal. 44. In a ..... circuit, if one light bulb goes out, all light bulbs will go out. A) Parallel. B) Series. C) Partial. D) Closed. Show Answer Correct Answer: B) Series. 45. The SI Unit of electric current is the ..... A) Electricity. B) Coulumb. C) Ampere. D) Volt. Show Answer Correct Answer: C) Ampere. 46. A current of 2.0 A is produced when 500 C flow from X to Y in a circuit.Calculate the time taken for 500 C to move from X to Y. A) 0.0040 s. B) 250 s. C) 1000 s. D) None of the above. Show Answer Correct Answer: B) 250 s. 47. If the current through a circuit is 2 A and the resistance of a light bulb in the circuit is 10 Ohms, what is the voltage difference across the light bulb? A) 12 V. B) 5 V. C) 20 V. D) 0.2 V. Show Answer Correct Answer: C) 20 V. 48. A cell supplies a current of 0.9 A through a 2 ohm, resistor and a current of 0.3A through a 7 ohm resistor. The internal resistance of the cell is A) 0.5 ohm. B) 2 ohm. C) 1 ohm. D) 1.5 ohm. Show Answer Correct Answer: A) 0.5 ohm. 49. The instrument for the accurate determination of the emf of the cell is A) Slide wire bridge. B) Potentiometer. C) Ammeter. D) Voltmeter. Show Answer Correct Answer: B) Potentiometer. 50. Which electromagnet would have the most strength? A) An electromagnet with 15 coils. B) An electromagnet with 20 coils. C) An electromagnet with 10 coils. D) An electromagnet with 5 coils. Show Answer Correct Answer: B) An electromagnet with 20 coils. 51. Kirchhoff's junction and loop rules of electrical circuits are consequences of ..... A) Conservation of energy. B) Conservation of electric charge and energy respectively. C) Conservation of electric charge. D) Conservation of energy and electric charge respectively. Show Answer Correct Answer: B) Conservation of electric charge and energy respectively. 52. What is the property of a material that determines its resistance? A) Inductance. B) Resistivity. C) Conductivity. D) Capacitance. Show Answer Correct Answer: B) Resistivity. 53. Find the emf of cell which balance against a length of 280cm of potentiometer wire, given potential difference per cm wire as 0.008 A) 1.08 V. B) 2.24 V. C) 2.04 V. D) 3.25 V. Show Answer Correct Answer: B) 2.24 V. 54. Electric potential difference is ..... A) The product of kinetic energy and charge. B) The product of potential energy and charge. C) The change in kinetic energy per unit of charge. D) The change in potential energy per unit of charge. Show Answer Correct Answer: D) The change in potential energy per unit of charge. 55. A wire has a resistance of 3.1 ohm at 30$^{0}$ C and a resistance 4.5 ohm at 100$^{0}$ C. The temperature coefficient of resistance of the wire is A) 0.0064 $^{o}$ C$^{-1}$. B) 0.0034 $^{O}$C$^{-1}$. C) 0.0025 $^{o}$C$^{-1}$. D) 0, 0012 $^{0}$C$^{-1}$. Show Answer Correct Answer: A) 0.0064 $^{o}$ C$^{-1}$. 56. From which electrode does the energy flow from in a circut? A) Positive to negavtive. B) Neg to posTagslol. C) All the above. D) None of the above. Show Answer Correct Answer: B) Neg to posTagslol. 57. Which statement is true about convex mirror? A) Image formed is virtual and diminished. B) Have a positive value of focal length. C) Image formed is real and diminished. D) Image formed is real and magnified. Show Answer Correct Answer: A) Image formed is virtual and diminished. 58. Which cell has the reversible chemical reaction A) Primary Cell. B) Secondary Cell. C) All the above. D) None of the above. Show Answer Correct Answer: B) Secondary Cell. 59. For a) metals and b) semiconductors, the number of charge carriers A) Increases b) increases. B) Remains constant b)increases. C) Decreases b) remains constant. D) Increases b) increases. Show Answer Correct Answer: B) Remains constant b)increases. 60. What does DC stand for? A) Power plants. B) Direct current. C) Alternating current. D) None of the above. Show Answer Correct Answer: B) Direct current. ← PreviousNext →Related 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 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 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books