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 5 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 10 Electric Current And Its Effects Quiz 5 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Choose The Combination Of Correct Answer From The Following: A) Circuit is open and no current flows through it. B) Current flows after sometime. C) Circuit starting from positive terminal of the cell stops at the switch and circuit is open. D) All are correct. Show Answer Correct Answer: A) Circuit is open and no current flows through it. 2. Identify the best conductor of electricity. A) Silver. B) Aluminum. C) Gold. D) Copper. Show Answer Correct Answer: D) Copper. 3. Which mark is present on electric appliances to ensure their safety? A) ISI. B) MCB. C) ECB. D) Fssai. Show Answer Correct Answer: A) ISI. 4. A motor uses electricity to create magnetic fields A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 5. Which of the following is attracted by a magnet: A) Iron. B) Copper. C) Brass. D) Aluminium. Show Answer Correct Answer: A) Iron. 6. How does electric current affect substances like water and copper sulfate? A) Electric current can change the color of water and copper sulfate. B) Electric current can cause copper sulfate to evaporate. C) Electric current can turn water into solid ice. D) Electric current can cause electrolysis in water, separating it into hydrogen and oxygen gas. In the case of copper sulfate, the current can cause the deposition of copper metal on the electrode. Show Answer Correct Answer: D) Electric current can cause electrolysis in water, separating it into hydrogen and oxygen gas. In the case of copper sulfate, the current can cause the deposition of copper metal on the electrode. 7. The amount of heat produced in a wire depends on A) Material. B) Length. C) Thickness. D) All of these. Show Answer Correct Answer: D) All of these. 8. True/FalseOxygen is released at the side of cathode A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 9. The electrically charged atoms or group of atoms formed when a chemical compound is not dissolved in water are called ions. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 10. Which of the following is not an application of electrostatics? A) The photocopier. B) Defibrillator. C) Electric bell. D) From the Graaf Generator. Show Answer Correct Answer: C) Electric bell. 11. In which direction do electrons flow in circuit A) POsitive to negative. B) Negative to positive. C) Do not move. D) None of the above. Show Answer Correct Answer: B) Negative to positive. 12. The unit of resistivity in SI unit is ..... A) Metre. B) Ametre. C) Voltmeter. D) Ohm meter. Show Answer Correct Answer: D) Ohm meter. 13. The production of electricity from magnetism is called: A) Electrostatic induction. B) Electromagnetic induction. C) Current electricity. D) None of these. Show Answer Correct Answer: B) Electromagnetic induction. 14. The resistivity of alloy manganin is A) Increases rapidly with increase in temperature. B) Decreases with increase in temperature. C) Nearly independent of temperature. D) Increases rapidly with decrease in temperature. Show Answer Correct Answer: C) Nearly independent of temperature. 15. True or false:Sometimes magnets break into pieces that only show magnetism on one side (which is called a monopole). A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 16. LEDs full form is- A) Light Etern Dot. B) Light Emitting Diode. C) Light Era Diode. D) Light Emitting Dot. Show Answer Correct Answer: B) Light Emitting Diode. 17. On passing electricity through copper sulphate solution. A) Oxygen is formed at anode. B) Hydrogen is formed at cathode. C) Copper is formed at cathode. D) Copper is formed at anode. Show Answer Correct Answer: C) Copper is formed at cathode. 18. ..... is the the imaginary line joining the two poles A) Electricity. B) Magnetic axis. C) All the above. D) None of the above. Show Answer Correct Answer: B) Magnetic axis. 19. When one light bulb burns out, the rest stay lit. The bulbs must be found in ..... A) Series circuit. B) Parallel circuit. C) All the above. D) None of the above. Show Answer Correct Answer: B) Parallel circuit. 20. What is electrolysis? A) Electrolysis is the process of using a magnetic field to drive a chemical reaction. B) Electrolysis is the process of using pressure to drive a chemical reaction. C) Electrolysis is the process of using heat to drive a chemical reaction. D) Electrolysis is the process of using an electric current to drive a non-spontaneous chemical reaction. Show Answer Correct Answer: D) Electrolysis is the process of using an electric current to drive a non-spontaneous chemical reaction. 21. What advantage does an electromagnet have over a magnet? A) It can be switched on and off. B) It is stronger. C) It is easier to change shape. D) None of the above. Show Answer Correct Answer: A) It can be switched on and off. 22. What is an anion's charge? A) Negative. B) Depends on the element's charge. C) Positive. D) Neutral. Show Answer Correct Answer: A) Negative. 23. Electromagnets can be turned on and off by adding or removing electric current. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 24. What is the primary gas found in the Earth's atmosphere? A) Nitrogen. B) Hydrogen. C) Oxygen. D) Carbon Dioxide. Show Answer Correct Answer: A) Nitrogen. 25. What affects the density of water? A) Salt. B) Temperature. C) The seasons of the year. D) Both A and B. Show Answer Correct Answer: D) Both A and B. 26. Electric fuse is made of: A) Iron. B) Copper. C) Tin-lead alloy. D) None of these. Show Answer Correct Answer: C) Tin-lead alloy. 27. True or False:A fuse can be replaced by any piece of wire. A) False. B) True. C) All the above. D) None of the above. Show Answer Correct Answer: A) False. 28. If the Voltage is increased and the resistance stays the same, Current will A) X. B) Stay the same. C) Increase. D) Decrease. Show Answer Correct Answer: C) Increase. 29. When clothes are run through a dryer, they often become charged and stick together. What causes the charges to separate? A) A. The charges separate when the clothes are near one another. B) B. The heat and friction of the dryer provide energy to separate the charges. C) C. The electric force separates the charges from one another. D) None of the above. Show Answer Correct Answer: B) B. The heat and friction of the dryer provide energy to separate the charges. 30. The potential difference across a component is 50 V, and the charge that flows through the component is 25 C. What is the work done to drive these charges through? A) 50 J. B) 1250 J. C) 0.5 J. D) 2 J. Show Answer Correct Answer: B) 1250 J. 31. Electroplating is a process that uses which of the following effect of electricity? A) Heating Effect. B) Magnetic Effect. C) Chemical Effect. D) All of the above. Show Answer Correct Answer: C) Chemical Effect. 32. What is electroplating? Provide an example of an object that is electroplated. A) A copper-plated bicycle tire. B) An example of an object that is electroplated is a chrome-plated car bumper. C) A gold-plated toothbrush. D) A silver-plated smartphone. Show Answer Correct Answer: B) An example of an object that is electroplated is a chrome-plated car bumper. 33. In which of these is current not conducts by electron? A) Aluminum. B) Tap water. C) Mercury. D) Copper. Show Answer Correct Answer: B) Tap water. 34. When electric current is passed through the copper sulphate solution, copper and sulphate ions are dissociated. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 35. When we connect cells in ..... , all the positive terminals of all the cells are connected together. A) Parallel. B) Series. C) All the above. D) None of the above. Show Answer Correct Answer: A) Parallel. 36. Arrangement used to reduce the resistance in a circuit A) Resistors connected in alternate. B) Resistors connected in series. C) Resistors connected in parallel. D) Resistors connected in combination. Show Answer Correct Answer: C) Resistors connected in parallel. 37. An electric lamp glows due to A) Magnetic effect. B) Chemical effect. C) Physical effect. D) Heating effect. Show Answer Correct Answer: D) Heating effect. 38. A rectangular coil copper wires is rotated in a magnetic field. The direction of the induced current changes once in each: A) One revolution. B) One-forth revolution. C) Two revolution. D) Half revolution. Show Answer Correct Answer: D) Half revolution. 39. In parallel combination of n cells, we obtain A) More current. B) Less voltage. C) Less current. D) More voltage. Show Answer Correct Answer: A) More current. 40. Symbol for the potential differences is ..... A) I. B) R. C) C. D) V. Show Answer Correct Answer: D) V. 41. Adding common salt to distilled water makes it A) Good conductor. B) Poor conductor. C) No change. D) Good and bad conductor both. Show Answer Correct Answer: A) Good conductor. 42. Which wire will have more resistance? A) Long. B) Short. C) All the above. D) None of the above. Show Answer Correct Answer: A) Long. 43. A wire gets hot when electric current passes through it A) Magnetic effect. B) Heating effect. C) Cooling effect. D) None. Show Answer Correct Answer: B) Heating effect. 44. Distilled water can A) Not conduct electricity. B) Conduct electricity. C) All the above. D) None of the above. Show Answer Correct Answer: A) Not conduct electricity. 45. A form of energy caused by the movement of electrons A) Electricity. B) Voltage. C) Electric current. D) Parallel circuit. Show Answer Correct Answer: A) Electricity. 46. Moving a magnet towards a coil sets up a current in the coil circuit, as indicated by the deflection in the ..... Needle A) Compass. B) Galvanometer. C) Ammeter. D) Voltmeter. Show Answer Correct Answer: B) Galvanometer. 47. In a filament type bulb, a lot of electric energy is wasted in the form of A) Light. B) Sound. C) Heat. D) Magnetism. Show Answer Correct Answer: C) Heat. 48. Longer line in cell symbol? A) +ve. B) -ve. C) All the above. D) None of the above. Show Answer Correct Answer: A) +ve. 49. Which of the following consumes the least amount of electricity to produce a given intensity of light? A) Incandescent electric bulb. B) LED bulb. C) CFL. D) None of the above. Show Answer Correct Answer: B) LED bulb. 50. What type of cells are used in rechargeable batteries A) Electrolyte cells. B) Secondary cells. C) Primary cells. D) Button cells. Show Answer Correct Answer: B) Secondary cells. 51. In a neutral atom, the number of electrons is equal to the number of ..... A) Neutrons. B) Protons. C) Orbits. D) Subatomic particles. Show Answer Correct Answer: B) Protons. 52. Distilled water is A) A poor conductor. B) A good conductor. C) Both of these. D) None of these. Show Answer Correct Answer: A) A poor conductor. 53. Which particles make up the nucleus of an atom? A) Protons and neutrons. B) Electrons and protons. C) Electrons, protons, and neutrons. D) Electrons and neutrons. Show Answer Correct Answer: A) Protons and neutrons. 54. Which part of an atom is responsible for flow of current? A) Proton. B) Electron. C) Ions. D) Neutron. Show Answer Correct Answer: B) Electron. 55. What types of charges attract? A) Positive and Positive. B) Positive and Neutral. C) Negative and Neutral. D) Positive and Negative. Show Answer Correct Answer: D) Positive and Negative. 56. Which process is responsible for the water cycle in nature? A) Condensation. B) Respiration. C) Evaporation. D) Photosynthesis. Show Answer Correct Answer: C) Evaporation. 57. A current carrying conductor is placed parallel to the magnetic field. The force acting on it will be: A) Maximum. B) Zero. C) Nothing can be said. D) All of these. Show Answer Correct Answer: B) Zero. 58. In which year dry cell was developed by Carl Gassner? A) 1996. B) 1866. C) 1886. D) None of the above. Show Answer Correct Answer: C) 1886. 59. Which of these plants should the farmer grow to replenish nitrogen back into the soil? A) Bacteria. B) Coral root. C) Wheat. D) Peas. Show Answer Correct Answer: D) Peas. 60. Which of these can supply current to an electrical circuit? A) A switch. B) A battery. C) Wire. D) A light bulb. Show Answer Correct Answer: B) A battery. ← PreviousNext →Related QuizzesScience QuizzesClass 7 QuizzesClass 7 Science Chapter 10 Electric Current And Its Effects Quiz 1Class 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 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