This quiz works best with JavaScript enabled. Home > Cbse > Class 7 > Science > Electric Current And Its Effects > Class 7 Science Chapter 10 Electric Current And Its Effects – Quiz 1 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 10 Electric Current And Its Effects Quiz 1 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. If in a circuit diagram containing a cell and nichrome wire tied between two nails, the cell is replaced by a battery then what will happen to the nichrome wire? A) The wire will break due to increase in strength of current. B) No change in the temperature take place. C) It gets red hot slowly. D) It will get red hot quickly. Show Answer Correct Answer: D) It will get red hot quickly. 2. Materials which do not allow electricity to flow through it. A) Insulators. B) Conductors. C) None. D) None of the above. Show Answer Correct Answer: A) Insulators. 3. This is the formula for the effective resistance connected in ..... Rs = R1+ R2+ R3+ R4 ..... Rn. A) Resisteres connected in series. B) Resisteres connected in parallel. C) All the above. D) None of the above. Show Answer Correct Answer: A) Resisteres connected in series. 4. The continuous flow of electric charges through a material A) Electric current. B) Electric circuit. C) Voltage. D) Parallel circuit. Show Answer Correct Answer: A) Electric current. 5. If the voltage stays the same, but the resistance goes up, the current will ..... A) Increase (speed up). B) Decrease (slow down). C) Stay the same. D) None of the above. Show Answer Correct Answer: B) Decrease (slow down). 6. Heating effect of electric current is used in A) Checking temperature. B) Pan. C) Room heaters. D) None of the above. Show Answer Correct Answer: C) Room heaters. 7. Which one of the following solutions will not conduct electricity? A) Lemon juice. B) Tap water. C) Vinegar. D) Toothpaste. Show Answer Correct Answer: D) Toothpaste. 8. SI unit of current is ammeter. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 9. What happens to a current when it comes in contact with a continent or landmass? A) It continues over the continent. B) It stops. C) It changes direction. D) It is absorbed by the land. Show Answer Correct Answer: C) It changes direction. 10. What is the full form of the ISI mark? A) Indian standard institution. B) India standards institutions. C) Indian Standards institution. D) None of the above. Show Answer Correct Answer: C) Indian Standards institution. 11. The electrode that contains the plating metal A) Anode. B) Cathode. C) All the above. D) None of the above. Show Answer Correct Answer: A) Anode. 12. Two types of water currents are A) Local and global. B) Sea and land. C) Surface and deep. D) Warm and cold. Show Answer Correct Answer: C) Surface and deep. 13. Wood, plastic, and rubber are ..... A) Conductors. B) Homogeneous. C) Collide. D) Isulators. Show Answer Correct Answer: D) Isulators. 14. Assertion-Only Iron is used for making electromagnets. Reason-Iron behaves as a magnet. A) Assertion is false and reason is true. B) Both are false. C) Assertion is true but the reason is not the correct explanation of assertion. D) Assertion is true and reason is the correct explanation of assertion. Show Answer Correct Answer: C) Assertion is true but the reason is not the correct explanation of assertion. 15. An electrolyte is A) A metal. B) A solution. C) A liquid that conducts current. D) All of the above. Show Answer Correct Answer: C) A liquid that conducts current. 16. Identify the element that is required for making the filament in bulbs? A) Tungsten. B) Silver. C) Aluminium. D) Copper. Show Answer Correct Answer: A) Tungsten. 17. Magnetic effect of electric current was invented by A) Coulomb. B) Oasted. C) Joule. D) None of the above. Show Answer Correct Answer: B) Oasted. 18. Daniel wanted to gift a silver plated spoon to his mother. He used the technique of electroplating for this purpose. Which end of the battery should the spoon be connected to? A) Positive. B) Negative. C) Doesn't matter. D) None of the above. Show Answer Correct Answer: B) Negative. 19. Which mark is necessary on electric appliances? A) AGMARK. B) FICCI. C) KSK. D) ISI. Show Answer Correct Answer: D) ISI. 20. Joe set up an electrical circuit to determine whether certain materials would conduct electricity. Which of these items would complete Joe's circuit? A) A metal pin. B) A plastic bag. C) A rubber ball. D) A wooden block. Show Answer Correct Answer: A) A metal pin. 21. Electric ..... can flow through metals A) Light energy. B) Current. C) Correct. D) None. Show Answer Correct Answer: B) Current. 22. Allows electricity to flow through them A) Conductors. B) Insulators. C) None. D) None of the above. Show Answer Correct Answer: A) Conductors. 23. An electric component used as a safety device in electric circuit is A) Cell. B) Switch. C) Fuse. D) Electric wires. Show Answer Correct Answer: C) Fuse. 24. What is a switch's function in a circuit? A) To make the current hotter or colder. B) Turn on and off the flow of current. C) The pathway that current flows. D) To add more power to the circuit. Show Answer Correct Answer: B) Turn on and off the flow of current. 25. What device changes electrical energy to mechanical energy? A) Conductor. B) Electric motor. C) Generator. D) Electromagnet. Show Answer Correct Answer: B) Electric motor. 26. The magnetic effect of electric current was first discovered by: A) Alexander Flemming. B) Oersted. C) Ampere. D) Maxwell. Show Answer Correct Answer: B) Oersted. 27. Frayed wires are a common cause of what? A) Infection. B) Short circuits that cause fires. C) Lightning. D) None of the above. Show Answer Correct Answer: B) Short circuits that cause fires. 28. Which rule can be used to work out which way a coil of wire rotates in a motor? A) Fleming's left-hand rule. B) Fleming's right-hand rule. C) All the above. D) None of the above. Show Answer Correct Answer: A) Fleming's left-hand rule. 29. In the domestic electric circuit, which of the following arrangement is used A) Series arrangement. B) Parallel arrangement. C) Both (a) and (b). D) None of these. Show Answer Correct Answer: B) Parallel arrangement. 30. A battery has one or more cells A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 31. The combination of two or more cells is called a ..... A) Key. B) Circuit. C) Battery. D) Resistance. Show Answer Correct Answer: C) Battery. 32. A closed loop through which current can flow is called an ..... A) Electric Force. B) Electric Current. C) Electric Circuit. D) None of the above. Show Answer Correct Answer: C) Electric Circuit. 33. Which of these metals will you electoplate on iron to protect it from rusting and to make it shine? A) Gold. B) Copper. C) Chromium. D) Zinc. Show Answer Correct Answer: D) Zinc. 34. Name the process in which a metal is coated with a thin layer of another metal using electrolysis. A) Electrofusion. B) Electroplating. C) Metallic coating. D) Electrocoating. Show Answer Correct Answer: B) Electroplating. 35. Which of these below would prevent the flow of electricity? A) Copper wire. B) Screwdriver with plastic handle. C) Metal rod. D) Puddle of water. Show Answer Correct Answer: B) Screwdriver with plastic handle. 36. Flow of electrons is called A) Electric current. B) Electroplating. C) Electrode. D) Electrolyte. Show Answer Correct Answer: A) Electric current. 37. Which of the following solutions will not make the bulb in Fig 14.2 glow? A) Sugar solution in diluted water. B) Copper sulphate. C) Silver nitrate. D) Sodium chlorides. Show Answer Correct Answer: A) Sugar solution in diluted water. 38. When a switch is in OFF position, (Choose the most suitable answer) A) (iii) no current flows through it. B) (iv) current flows after some time. C) (ii) the circuit is open. D) (i) circuit starting from the positive terminal of the cell stops at the switch. Show Answer Correct Answer: C) (ii) the circuit is open. 39. Two particles X and Y having equal charges, and accelerated through same potential and enters the uniform magnetic field describing circular paths of radii R$_{1}$ and R$_{2}$. The ratio of their masses of X and Y is: A) (R$_{1}$ / R$_{2}$) $^{2}$. B) (R$_{1}$ / R$_{2}$). C) R$_{2}$ / R$_{1}$. D) (R$_{1}$ / R$_{2}$) $^{1/2}$. Show Answer Correct Answer: A) (R$_{1}$ / R$_{2}$) $^{2}$. 40. What is the density of an object that has a mass of 20 grams and a volume of 10 ml? Will this object sink or float in water? A) 2.0, sink. B) 0.5, sink. C) 0.5, float. D) 2.0, float. Show Answer Correct Answer: A) 2.0, sink. 41. Electroplating prevents A) Lightening. B) Chemical effect. C) Rusting. D) Electric current. Show Answer Correct Answer: C) Rusting. 42. Coal burns with ..... A) Flame. B) Only glow. C) Both a & b. D) None of these. Show Answer Correct Answer: B) Only glow. 43. What is the potential difference between the two ends of a connecting wire? A) Zero. B) 1 V. C) Infinity. D) None of the above. Show Answer Correct Answer: A) Zero. 44. Ms Jo Jo 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. 45. A negatively charged particle projected towards west is deflected towards North by a magnetic field. The direction of magnetic field is: A) Towards East. B) Towards south. C) Downward. D) Upward. Show Answer Correct Answer: C) Downward. 46. Which of the given appliances does not contain any heating element? A) Electric iron. B) Electric room heater. C) Electric bell. D) Electric oven. Show Answer Correct Answer: C) Electric bell. 47. Which of the following is a good conductor? A) Steel. B) Plastic. C) Brick. D) Cotton. Show Answer Correct Answer: A) Steel. 48. Which of the following chemicals are NOT used in a dry cell? A) Ammonium Chloride. B) Blue Vitriol. C) Manganese dioxide. D) None of the above. Show Answer Correct Answer: B) Blue Vitriol. 49. The word magnet has been derived from the word A) Glass. B) Magnetite. C) All the above. D) None of the above. Show Answer Correct Answer: B) Magnetite. 50. Poor conductors of electricity are called A) Insulators. B) Semiconductors. C) Semi-Insulators. D) Conductors. Show Answer Correct Answer: A) Insulators. 51. Electricity can be made by heating the junction of certain dissimilar metals. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 52. The process of depositing a layer of any desired metal on another material by means of electricity is called ..... A) Electric refining. B) Electroplating. C) Electric depositing. D) None of the above. Show Answer Correct Answer: B) Electroplating. 53. Lets start with an easy one. A combination of 2 or more cells is known as A) A battery. B) A bulb. C) A switch. D) An electric cell. Show Answer Correct Answer: A) A battery. 54. Sea water is an example of A) Bad conductor. B) Strong electrolyte. C) Weak electrolyte. D) None of these. Show Answer Correct Answer: B) Strong electrolyte. 55. What is the direction of conventional current flow? A) From positive terminal to negative terminal. B) From negative terminal to negative terminal. C) From negative terminal to positive terminal. D) From positive terminal to positive terminal. Show Answer Correct Answer: A) From positive terminal to negative terminal. 56. What charge does an electron have? A) Negative (-). B) Positive (+). C) Neutral or no charge (0). D) None of the above. Show Answer Correct Answer: A) Negative (-). 57. The magnetic lines of force in the middle of the current carrying solenoid are: A) Circles. B) Parallel to the axis of solenoid. C) Spirals. D) Perpendicular to the axis of solenoid. Show Answer Correct Answer: B) Parallel to the axis of solenoid. 58. The anode in electrolyte is negative. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 59. The magnitude of magnetism produced by an electric current in a wire depends upon-(a) Increases with an increase in the strength of electric current (b) Decreases, as the distance from the wire increases A) Both a, b. B) Only a. C) Only b. D) None. Show Answer Correct Answer: A) Both a, b. 60. Current density formula is A) Electric Current / length. B) Electric Current / area. C) Electric Current / volume. D) None of above. Show Answer Correct Answer: B) Electric Current / area. Next →Related QuizzesScience QuizzesClass 7 QuizzesClass 7 Science Chapter 10 Electric Current And Its Effects Quiz 2Class 7 Science Chapter 10 Electric Current And Its Effects Quiz 3Class 7 Science Chapter 10 Electric Current And Its Effects Quiz 4Class 7 Science Chapter 10 Electric Current And Its Effects Quiz 5Class 7 Science Chapter 10 Electric Current And Its Effects Quiz 6Class 7 Science Chapter 10 Electric Current And Its Effects Quiz 7Class 7 Science Chapter 10 Electric Current And Its Effects Quiz 8Class 7 Science Chapter 10 Electric Current And Its Effects Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books