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 14 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 14 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is the effect of increasing the area of cross-section of a conductor on its resistance? A) Decreases resistance. B) Doubles resistance. C) No effect. D) Increases resistance. Show Answer Correct Answer: A) Decreases resistance. 2. 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. 3. 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. 4. 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. 5. The heat produced per unit time, on passing electric current through a conductor at a given temperature, is directly proportional to the ..... A) Reciprocal of electric current. B) Reciprocal of square of electric current. C) Square of electric current. D) Electric current. Show Answer Correct Answer: C) Square of electric current. 6. A circuit with 3 resistors, 20 Ohms, 10 Ohms, and 20 Ohms are in series. What is the total resistance? A) 33 Ohms. B) 43 Ohms. C) 50 Ohms. D) 60 Ohms. Show Answer Correct Answer: C) 50 Ohms. 7. 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) 3. B) 2. C) 1.5. D) 1. Show Answer Correct Answer: D) 1. 8. 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 direct current at low voltages, but used at high voltages. D) Transmits alternating 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. 9. 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. 10. 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. 11. Which of these will the south pole of a bar magnet repel? A) An iron nail. B) The north pole of another magnet. C) A paper clip. D) The south pole of another magnet. Show Answer Correct Answer: D) The south pole of another magnet. 12. Nichrome or manganin is widely used in wire bound standard resistors because of its A) Very weakly temperature dependent resistivity. B) Mechanical strength. C) Temperature independent resistivity. D) Strong dependence of resistivity with temperature. Show Answer Correct Answer: A) Very weakly temperature dependent resistivity. 13. 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) Discharge. B) Circuit. C) Repulsion. D) Proton. E) Friction. Show Answer Correct Answer: A) Discharge. 14. 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. 15. Water in the waterfall flows from a higher level to the lower level because of ..... A) Magnetic force. B) Water is Light. C) Gravitional force. D) Electrical force. Show Answer Correct Answer: C) Gravitional force. 16. If two magnetic South poles are brought near each other, what would the magnetic field lines look like? A) Since South poles repel, there would not be any lines. B) The lines would move out, but then curve away from each other. C) The lines would connect between the poles. D) The lines would curve like an "S". Show Answer Correct Answer: B) The lines would move out, but then curve away from each other. 17. Accumulation of electrical charges on the surface of an object A) Static Electricity. B) Current Electricity. C) All the above. D) None of the above. Show Answer Correct Answer: A) Static Electricity. 18. What does a generator do? A) Move electricity from place to place. B) Increase or decrease the voltage of the electricity. C) Change mechanical energy into electrical energy. D) None of the above. Show Answer Correct Answer: C) Change mechanical energy into electrical energy. 19. Two copper wires have the same cross-sectional area but have different lengths. Wire X has a length L and wire Y has a length 2L. The ratio between the resistance of wire Y and wire X is: A) 2:1. B) 1:4. C) 1:2. D) 4:1. Show Answer Correct Answer: A) 2:1. 20. What is a kilo equal to? A) 100. B) 1, 000, 000. C) 100, 000. D) 1, 000. Show Answer Correct Answer: D) 1, 000. 21. What specifically does resistance reduce the flow of? A) Current. B) Voltage. C) Electricity. D) None of the above. Show Answer Correct Answer: A) Current. 22. As temperature decreases what happens to the resistance of copper and germanium? A) Both remains the same. B) Resistance of copper decreases whereas resistance of Germanium increases. C) Resistance of copper increases whereas resistance of Germanium decreases. D) For both resistance is decreased. Show Answer Correct Answer: B) Resistance of copper decreases whereas resistance of Germanium increases. 23. A light circuit is operating at 75 Volts. What is the circuit's current if the resistance is 5 Ohms? A) 0.07 Amps. B) 50 Amps. C) 375 Amps. D) 15 Amps. Show Answer Correct Answer: D) 15 Amps. 24. Electric current DOES NOT flow in A) A complete circuit. B) A closed circuit. C) An electromagnet. D) An open circuit. Show Answer Correct Answer: D) An open circuit. 25. Which of the following are sources of mechanical energy? A) Cars and trucks. B) Radios and televisions. C) Transmission lines and transformers. D) Wind and fossil fuels. Show Answer Correct Answer: D) Wind and fossil fuels. 26. What type of device converts electrical energy into mechanical energy A) Galvanometer. B) Transformers. C) Electric motors. D) Generator. Show Answer Correct Answer: C) Electric motors. 27. An object becomes positively charged by A) Losing protons. B) Gaining protons. C) Gaining electrons. D) Losing electrons. Show Answer Correct Answer: D) Losing electrons. 28. Which of the following statements is the only correct statement for a potentiometer? A) It cannot measure resistance. B) It cannot measure the capacitance of a capacitor. C) It cannot measure current. D) It cannot measure potential difference. Show Answer Correct Answer: B) It cannot measure the capacitance of a capacitor. 29. Which device is used to measure current electricity? A) Ammeter. B) Barometer. C) Voltmeter. D) Thermometer. Show Answer Correct Answer: A) Ammeter. 30. If a material does not allow charges to move through it easily, what is it called? A) An electrical conductor. B) A resistor. C) A capacitor. D) An electrical insulator. Show Answer Correct Answer: D) An electrical insulator. 31. Current in a conductor is due to A) Ions. B) Protons. C) Electrons. D) Both ions and electrons. Show Answer Correct Answer: C) Electrons. 32. A wire of 10ohm resistance is stretched to thrice its original length . Calculate the new resistance A) 3 ohm. B) No change. C) 9 ohm. D) 90 ohm. Show Answer Correct Answer: D) 90 ohm. 33. What is the primary difference between static and current electricity? A) Static electricity involves stationary charges, while current electricity involves moving charges. B) Static electricity is used in batteries, while current electricity is used in power lines. C) Static electricity is always dangerous, while current electricity is always safe. D) Static electricity is a form of renewable energy, while current electricity is not. Show Answer Correct Answer: A) Static electricity involves stationary charges, while current electricity involves moving charges. 34. Which of the following scenarios best illustrates the concept of current electricity? A) A person receiving a shock after walking on a carpet. B) A light bulb glowing when connected to a battery. C) A balloon sticking to a sweater after being rubbed. D) Hair standing on end after removing a hat. Show Answer Correct Answer: B) A light bulb glowing when connected to a battery. 35. Find the current through a wire of resistance 2 ohm which is connected to a supply of 100 V? A) 2 A. B) 200 A. C) 100 A. D) 50 A. Show Answer Correct Answer: D) 50 A. 36. Magnetism created by an electric current A) Electricity. B) Electromagnetism. C) Wind energy. D) None of the above. Show Answer Correct Answer: B) Electromagnetism. 37. Wires A and B are made from the same material. Wire A has a resistance of $48\Omega$ A) 48 $\Omega$. B) 96 $\Omega$. C) 12 $\Omega$. D) 24 $\Omega$. Show Answer Correct Answer: D) 24 $\Omega$. 38. What type of device converts mechanical energy into electrical energy? A) Generator. B) Electric motor. C) Solenoid. D) Transformer. Show Answer Correct Answer: A) Generator. 39. Which cell is non-rechargeable? A) Primary cell. B) Secondary Cell. C) All the above. D) None of the above. Show Answer Correct Answer: A) Primary cell. 40. In a parallel circuit, 0.8 A arrives at a junction between two wires. It splits with 0.2 A going down the first wire. What would the ammeter reading on the second wire be? A) 0.8 A. B) 0.2 A. C) It will depend on the resistance of the components down that wire. D) 0.6 A. Show Answer Correct Answer: D) 0.6 A. 41. Two magnets are stuck end to end by a magnetic force. Which statement best describes these magnets? A) The south poles of the magnets are attracted to each other. B) The north pole of one magnet is attracted to the south pole of the other magnet. C) The south pole of one magnet is repelled by the north pole of the other magnet. D) The north poles of the magnets are attracted to each other. Show Answer Correct Answer: B) The north pole of one magnet is attracted to the south pole of the other magnet. 42. You are going to build an electromagnet for a lab investigation. Which of the following lab supplies do you need to build an electromagnet? A) Insulated wire, compass, iron bar. B) Iron bar, battery and holder, light bulb. C) Compass, iron bar, light bulb. D) Insulated wire, iron bar, battery and holder. Show Answer Correct Answer: D) Insulated wire, iron bar, battery and holder. 43. What type of circuit only provides 1 pathway for electrical current? A) Parallel Circuit. B) Series Circuit. C) Single Circuit. D) Multiple Circuit. Show Answer Correct Answer: B) Series Circuit. 44. The voltage across a kettle is 230 V. Calculate the energy supplied if 100 C of charge pass through the kettle's wires. A) 2.3 J. B) 23 kJ. C) 440 kJ. D) 0.44 J. Show Answer Correct Answer: B) 23 kJ. 45. Emf is defined as A) Potential difference across the terminals of a cell when not in use. B) Work done in moving a unit positive charge in the externalcircuit and within the cell. C) Both a and b. D) Potential difference across the terminals of a cell when it is in use. Show Answer Correct Answer: C) Both a and b. 46. A type of automatic safety mechanism found in circuits that open when the current becomes dangerously high. A) Circuit breaker. B) Bulb. C) Parallel circuit. D) Circuit stopper. Show Answer Correct Answer: A) Circuit breaker. 47. What happens to the magnetic field around a wire when the current through it is increased? A) The magnetic field weakens. B) The magnetic field strengthens. C) The magnetic field disappears. D) The magnetic field remains unchanged. Show Answer Correct Answer: B) The magnetic field strengthens. 48. "The total current in a parallel circuit equals the sum of the individual branch currents." A) Bolen's Law. B) Kirchhoff's Voltage Law. C) Kirchhoff's Current Law. D) Ohm's Law. Show Answer Correct Answer: C) Kirchhoff's Current Law. 49. How must voltage be measured? A) In series. B) In series or parallel. C) In parallel. D) None of the above. Show Answer Correct Answer: C) In parallel. 50. The temperature coefficient for a wire is 0.00125$^{0}$C$^{-1}$.At 27$^{0}$C, its resistance is 1ohm.The temperature at which the resistance becomes 2ohms is A) 1100K. B) 1400K. C) 1154K. D) 1127K. Show Answer Correct Answer: A) 1100K. 51. What happens to the electrons in a conductor when a current flows through it? A) They move randomly. B) They move in a specific direction. C) They stop moving. D) They move in circles. Show Answer Correct Answer: B) They move in a specific direction. 52. If we get the resistance of the wire as 6 ohm, on introducing a 2 ohm resistance in the resistance box, in a meter bridge circuit, find the corresponding balancing length. A) 3 cm. B) 25 cm. C) 75 cm. D) None of the above. Show Answer Correct Answer: C) 75 cm. 53. Thermopile works on the principle of A) Joule effect. B) Thomson effect. C) Peltier effect. D) Seebeck effect. Show Answer Correct Answer: D) Seebeck effect. 54. The rate of flow of electric charge in a conductor is referred to as ..... A) Battery voltage. B) Electric current. C) Conduction electrons. D) Circuit resistance. Show Answer Correct Answer: B) Electric current. 55. Which of the following is an example of static electricity? A) A fan running on electricity. B) A battery powering a flashlight. C) A lightning bolt striking a tree. D) A toaster heating bread. Show Answer Correct Answer: C) A lightning bolt striking a tree. 56. Energy stored in the nucleus of an atom. A) WIND ENERGY. B) HYDRO & TIDAL POWER. C) SOLAR ENERGY. D) NUCLEAR ENERGY. Show Answer Correct Answer: D) NUCLEAR ENERGY. 57. What are the sources of mechanical energy mentioned in the text? A) Wind, moving water, and burning fossil fuels. B) Solar power, geothermal energy, and nuclear power. C) Biomass, tidal energy, and hydrogen fuel. D) None of the above. Show Answer Correct Answer: A) Wind, moving water, and burning fossil fuels. 58. In a Whetstone's bridge, all the four arms have equal resistance R. If resistance of thegalvanometer arm is also R, then equivalent resistance of the combination is A) R. B) 2R. C) R/2. D) R/4. Show Answer Correct Answer: A) R. 59. Ohm's law can be written in vector form as ..... A) $\overrightarrow{J}$ $\sigma$ $\overrightarrow{E}$. B) $\overrightarrow{J}$ $\rho$ $\overrightarrow{E}$. C) $\overrightarrow{J}$ $\overrightarrow{E}$. D) None of the above. Show Answer Correct Answer: A) $\overrightarrow{J}$ $\sigma$ $\overrightarrow{E}$. 60. The positive and negative ends of a battery A) Filament. B) Terminals. C) Duracell. D) Wires. Show Answer Correct Answer: B) Terminals. ← 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 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