This quiz works best with JavaScript enabled. Home > Cbse > Class 10 > Science > Electricity > Class 10 Science Chapter 12 Electricity – Quiz 5 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 10 Science Chapter 12 Electricity Quiz 5 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The resistance of hot filament of the bulb is about 10 times the cold resistance. What will be the resistance of 100 W-220 V lamp, when not in use? A) 484 oh. B) 400 oh. C) 48 oh. D) 48.4 Oh. Show Answer Correct Answer: A) 484 oh. 2. Materials which allow larger currents to flow through them are called A) Insulators. B) Conductors. C) Semiconductors. D) Alloys. Show Answer Correct Answer: B) Conductors. 3. When a steady current flows through a conductor, electrons in it move with a certain average. what is that average called? A) Steady speed. B) Drift speed. C) Uniform speed. D) Average speed. Show Answer Correct Answer: B) Drift speed. 4. What is resistance measured in? A) $\Omega$ (Ohms). B) V (Volts). C) A (Amps). D) W (Watts). Show Answer Correct Answer: A) $\Omega$ (Ohms). 5. State the formula for Ohm's Law. A) V = I * R. B) I = V + R. C) R = V-I. D) V = R / I. Show Answer Correct Answer: A) V = I * R. 6. The ratio of voltage and current is A) Decreases. B) Increases. C) Remains constant. D) None of the above. Show Answer Correct Answer: C) Remains constant. 7. Voltmeter should be connected in A) Series. B) Parallel. C) Series and parallel. D) None of the above. Show Answer Correct Answer: B) Parallel. 8. Ohm's law is applicable to? A) Vacuum tubes. B) None of these. C) Carbon resistors. D) Semiconductors. Show Answer Correct Answer: B) None of these. 9. Describe a real-life application of parallel circuits. A) Computer motherboard circuits. B) Battery charging systems. C) Solar panel connections. D) Household electrical wiring systems. Show Answer Correct Answer: D) Household electrical wiring systems. 10. What is the relationship between voltage, current, and resistance? A) Current is independent of voltage and resistance. B) Voltage is equal to current multiplied by resistance (V = I * R). C) Voltage is the same as current. D) Resistance is equal to voltage divided by current (R = V / I). Show Answer Correct Answer: B) Voltage is equal to current multiplied by resistance (V = I * R). 11. Which of the following is not a source of electrical energy? A) Ammeter. B) Mains. C) Dry cell. D) Dynamo. Show Answer Correct Answer: A) Ammeter. 12. Three resistors of 7.5 ohm, 10 ohm and 12.5 ohm are connected is series. The equivalent resistance of the circuit A) 3.1 ohm. B) 30 ohm. C) 20 ohm. D) 15 ohm. Show Answer Correct Answer: B) 30 ohm. 13. Three resistors of 1 $\Omega$, 2 ft and 3 $\Omega$ are connected in parallel. The combined resistance of the three resistors should be A) Less than 1 $\Omega$. B) Zero. C) Greater than 3 $\Omega$. D) Equal to 2 $\Omega$. Show Answer Correct Answer: A) Less than 1 $\Omega$. 14. If R$_{1}$ and R$_{2}$ be the resistance of the filament of 40 W and 60 W respectively operating 220 V, then ..... A) R$_{1}$ = R$_{2}$. B) R$_{1}$ < R$_{2}$. C) R$_{1}$ $\geq$ R$_{2}$. D) R$_{2}$ < R$_{1}$. Show Answer Correct Answer: D) R$_{2}$ < R$_{1}$. 15. Each proton force e =? A) Hc. B) Hv. C) Herz. D) Hr. Show Answer Correct Answer: B) Hv. 16. Which one could be considered a voltage source? A) Battery; it uses chemical reactions to generate voltage. B) Generator; nuclear, coal or natural gas are consumed in a power plant to produce steam, which spins a turbine attached to a generator and generates voltage. C) Solar panel; they convert the sun's rays into electricity. D) All of the above. Show Answer Correct Answer: D) All of the above. 17. The minimum energy to an electron to get out of the metallic head A) Minimum involvement. B) Maximum involvement. C) Involved. D) Work is involved. Show Answer Correct Answer: D) Work is involved. 18. A student was playing music on her new cell phone. The teacher explained that the phone was powered by a battery. The teacher then asked her to explain what was happening to the energy in her new phone. How could she best explain this to the class? A) Sound energy is transformed into electric energy. B) Electric energy is transformed into sound energy. C) Light energy is transformed into sound energy. D) Sound energy is transformed into electric energy. Show Answer Correct Answer: B) Electric energy is transformed into sound energy. 19. If the voltage is 12V and the resistance is 4$\Omega$, what is the current? A) Any. B) Chap. C) For. D) Chap. Show Answer Correct Answer: C) For. 20. The resistance when the length of the insulated increases ..... A) Rises. B) Diminishes. C) Does not change. D) High insertion of all. Show Answer Correct Answer: A) Rises. 21. The ratio of voltage and electric current in a closed circuit will A) Increases. B) Remains constant. C) Varies. D) Decreases. Show Answer Correct Answer: B) Remains constant. 22. The hindrance presented by material of conductor to the smooth passing of electric current is known as: A) Resistance. B) Conductance. C) Inductance. D) None of these. Show Answer Correct Answer: A) Resistance. 23. Tungsten is used as filament in lamps. Why? A) High melting point. B) High resistivity. C) Low oxidation. D) All the above. Show Answer Correct Answer: D) All the above. 24. The relation between potential difference (V) and current (I) is: A) V $\alpha$ I. B) V2 $\alpha$ I. C) V $\alpha$ 1/I. D) V a i2. Show Answer Correct Answer: A) V $\alpha$ I. 25. How to assemble an Old meter in the power circuit A) In serial order. B) Parallelly. C) Twice. D) What is not. Show Answer Correct Answer: B) Parallelly. 26. Electric current flows from A) Negative terminal to positive terminal. B) The flow rate of electric charges through a conductor. C) Detect electric current. D) Positive terminal to negative terminal. Show Answer Correct Answer: D) Positive terminal to negative terminal. 27. How does increasing the resistance affect the current in a circuit? A) Increasing resistance decreases the current in a circuit. B) Increasing resistance has no effect on the current in a circuit. C) Increasing resistance increases the current in a circuit. D) Increasing resistance causes the current to fluctuate unpredictably. Show Answer Correct Answer: A) Increasing resistance decreases the current in a circuit. 28. The SI unit of potential difference is A) Ampere, A. B) Ohm, $\Omega$. C) Was, v. D) Watt, W. Show Answer Correct Answer: C) Was, v. 29. A fuse wire repeatedly gets burnt when used with a good heater. It is advised to use a fuse wire of- A) More length. B) Less radius. C) Less length. D) More radius. Show Answer Correct Answer: D) More radius. 30. What is the formula for calculating electric power in terms of voltage and current? A) P = V / I. B) P = V + I. C) P = V * I. D) P = I / V. Show Answer Correct Answer: C) P = V * I. 31. To get 2 $\Omega$ $\Omega$ A) 6. B) 2. C) 3. D) 4. Show Answer Correct Answer: C) 3. 32. One volt is thepotential difference between two points in a current carrying conductor when 1 joule of work is done to move a charge of 1 coulomb from one point to the other. A) 1V=1W/1A. B) 1V=1J/1A. C) 1V=1J/1C. D) NONE OF THESE. Show Answer Correct Answer: C) 1V=1J/1C. 33. Which subatomic particles have a positive charge? A) Neutrons. B) Electrons. C) Protons. D) None of the above. Show Answer Correct Answer: C) Protons. 34. What is used to measure electric current? A) Wattmeter. B) PH meter. C) Ammeter. D) Voltmeter. Show Answer Correct Answer: C) Ammeter. 35. The other name of potential difference is: A) Amphereage. B) Wattage. C) Voltage. D) Potential energy. Show Answer Correct Answer: C) Voltage. 36. The potential difference that causes charges to move in a circuit is ..... A) Resistance. B) Electric discharge. C) Current. D) Voltage. Show Answer Correct Answer: D) Voltage. 37. How can an electrical capacity be defined A) The use rate of electric power. B) Work rate. C) The characteristic of the divisions and the current of the current. D) Everything is okay. Show Answer Correct Answer: D) Everything is okay. 38. An electric bulb is connected to a 220V generator. The current is 0.50 A. What is the power of the bulb? A) 55 W. B) 110 W. C) 440 W. D) 0.0023 W. Show Answer Correct Answer: B) 110 W. 39. The commercial unit of energy is: A) Watt-hour. B) Kilowatt-hour. C) Watt. D) Kilo. Show Answer Correct Answer: B) Kilowatt-hour. 40. An electric bulb is rated 220V and 100W.When it is operated on 110V.The power consumed will be A) Pumice. B) 50W. C) 100W. D) Brother. Show Answer Correct Answer: D) Brother. 41. The unit of electrical resistance is: A) Volt. B) Ampere. C) Coulomb. D) Ohm. Show Answer Correct Answer: D) Ohm. 42. A wire of resistance R is stretched to twice its original length. Its new resistance will be ..... ? A) 2R. B) $\frac{R}{2}$. C) $\frac{R}{4}$. D) 4r. Show Answer Correct Answer: D) 4r. 43. The rates of movement of charges can also be called A) Electrician. B) Electric current. C) Electric carrier. D) Electrical. Show Answer Correct Answer: B) Electric current. 44. The work done to move a unit of charge is A) Resistance, R. B) Potential difference, V. C) Power, P. D) Current, I. Show Answer Correct Answer: B) Potential difference, V. 45. Electric Current in a conductor is produced by? A) The Flow of Volt. B) The Flow of Ampere. C) The Flow of Electrons. D) The Flow of Coulomb. Show Answer Correct Answer: C) The Flow of Electrons. 46. Alloys are generally used in electric heating devices. Why? A) Alloys have higher resistivity. B) Alloys do not oxidize easily. C) High melting point. D) All the above. Show Answer Correct Answer: D) All the above. 47. The continuous and surrounded path of charges is thus A) Power-capacity. B) Electric power. C) Electricity. D) Electric power. Show Answer Correct Answer: C) Electricity. 48. Which of the following describes the flow of electric current? A) It flows from positive to negative. B) It flows from negative to positive. C) It flows in both directions. D) It does not flow at all. Show Answer Correct Answer: B) It flows from negative to positive. 49. What happens when an insulator is in the presence of a charged object? A) If they're touching, the insulator will prevent the object from transferring its charge to its surroundings. B) The insulator will become negatively charged. C) The object will instantly lose all of its charge at once. D) The object will transfer its charge to the insulator and its surroundings. Show Answer Correct Answer: A) If they're touching, the insulator will prevent the object from transferring its charge to its surroundings. 50. Four wires of resistance R are connected in form of square find its resistivitance A) 2R. B) 4r. C) R. D) 6r. Show Answer Correct Answer: C) R. 51. How many volts are in a circuit with a battery that has a resistance of 10 Ohms and a current of 2 Amps? A) .5 Volts. B) 5 Volts. C) 20 Volts. D) None of the above. Show Answer Correct Answer: C) 20 Volts. 52. Which of the given statements is not true, regarding the electrical set-up for the verification of Ohm's law: A) The voltmeter is connected in parallel with the known resistance. B) The ammeter is connected in series circuit. C) The rheostat can only increase the resistance in electric circuit. D) The single key is used to switch on/off the electric circuit. Show Answer Correct Answer: C) The rheostat can only increase the resistance in electric circuit. 53. An electric kettle consumes 1 kW of electric power when operated at 220 V. A fuse wire of what rating must be used for it? A) 5 A. B) 2 A. C) 1 A. D) 4 A. Show Answer Correct Answer: A) 5 A. 54. Which equation is correct by the law of Om A) V = go. B) R=V/I. C) I=V/I. D) High insertion of all. Show Answer Correct Answer: D) High insertion of all. 55. If R1 and R2 be the resistance of the filament of 40 W and 60 W respectively operating 220 V, then A) R2 B) R1 $\geq$ r2. C) R1 = r2. D) R1 Show Answer Correct Answer: A) R2 56. What is the unit of electrical resistance? A) Watt. B) Joule. C) Volt. D) Ohm. Show Answer Correct Answer: D) Ohm. 57. A wire of resistance 20 ohm is bent in form of a circle. Find the equivalent resistance between two diametrically opposite ends A) 5 ohm. B) 10 ohm. C) 40 ohm. D) 20 ohm. Show Answer Correct Answer: A) 5 ohm. 58. The device used to control the flow of electric current is A) Resistor. B) Capacitor. C) Inductor. D) Rheostat. Show Answer Correct Answer: D) Rheostat. 59. The other unit of electric power is A) Had ampere. B) Ohm meter. C) Watt second. D) None of the above. Show Answer Correct Answer: A) Had ampere. 60. The rate of flow of charges is called as A) Current, I. B) Potential difference, V. C) Resistance, R. D) Power, P. Show Answer Correct Answer: A) Current, I. ← PreviousNext →Related QuizzesScience QuizzesClass 10 QuizzesClass 10 Science Chapter 12 Electricity Quiz 1Class 10 Science Chapter 12 Electricity Quiz 2Class 10 Science Chapter 12 Electricity Quiz 3Class 10 Science Chapter 12 Electricity Quiz 4Class 10 Science Chapter 12 Electricity Quiz 6 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books