This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 10 Electric Current And Its Effects – Quiz 35 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 10 Electric Current And Its Effects Quiz 35 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Consider The Following Statements And Choose The Correct One: A) Electricity is a form of energy. B) The flow of electricity through a conductor is called electric current. C) Electricity is useful because it can run many appliances in our day-to-day life which make our work easier. D) All the above. Show Answer Correct Answer: D) All the above. 2. A conductor is any material which ..... electricity to pass through it A) Allows. B) Does not allow. C) All the above. D) None of the above. Show Answer Correct Answer: A) Allows. 3. The essential difference between an A.C. generator and a D.C. generator is that: A) A.C. generator has an electromagnet while a D.C. generator has a permanent magnet. B) D.C. generator will generate a higher voltage. C) A.C. generator will generate a higher voltage. D) A.C. generator has slip rings while the D.C. generator has a commutator. Show Answer Correct Answer: D) A.C. generator has slip rings while the D.C. generator has a commutator. 4. While trying to put out fire in an electrical appliance, we should A) Pour distilled water on it. B) Pour rain water on it. C) Pour tap water on it. D) None of these. Show Answer Correct Answer: D) None of these. 5. In making a battery: A) Positive terminal of one cell is connected to the negative terminal of the next cell. B) Positive terminal of one cell is connected to the positive terminal of the next cell. C) Negative terminal of one cell is connected to the negative terminal of the next cell. D) None of the above. Show Answer Correct Answer: A) Positive terminal of one cell is connected to the negative terminal of the next cell. 6. Electromagnetism is a magnetism produced by an electric current. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 7. Surface Ocean currents are primarily caused by A) Temperature and salinity. B) Wind. C) Convection. D) Continental drift. Show Answer Correct Answer: B) Wind. 8. Which of the following are applications of electroplating? A) Chromium plating in automobiles. B) Zinc plating (galvanization). C) Gold plated jewellery. D) All of the above. Show Answer Correct Answer: D) All of the above. 9. Electric fuse is made of material of: A) Low melting point. B) High melting point. C) Low resistance. D) None of these. Show Answer Correct Answer: A) Low melting point. 10. What is current? A) The flow of electric charge. B) Potential difference. C) The amount of energy. D) Water in a river. Show Answer Correct Answer: A) The flow of electric charge. 11. What are some methods to prevent corrosion? A) Using lemon juice. B) Applying protective coatings, using corrosion-resistant materials, cathodic protection, proper maintenance. C) Ignoring the issue. D) Exposing to extreme temperatures. Show Answer Correct Answer: B) Applying protective coatings, using corrosion-resistant materials, cathodic protection, proper maintenance. 12. Small amount of mineral salts present naturally in water are beneficial for human health. A) Truue. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) Truue. 13. To have a complete electric circuit, the path must be ..... A) Small. B) Closed. C) Big. D) Open. Show Answer Correct Answer: B) Closed. 14. Which of the following materials is commonly used to make permanent magnets? A) Copper. B) Aluminum. C) Iron. D) Plastic. Show Answer Correct Answer: C) Iron. 15. A set of electric trains are powered by a 9V battery. What is the resistance of the trains if they draw 3.0 A of current? A) 27 oh. B) 0.03 Oh. C) 2.7 Oh. D) 3 oh. Show Answer Correct Answer: D) 3 oh. 16. Where can the key or switch be placed in the circuit? A) The left side of the battery. B) The right side of the battery. C) Can be placed anywhere in the circuit. D) Near the positive terminal of the bulb. Show Answer Correct Answer: C) Can be placed anywhere in the circuit. 17. ..... is a safety device which works on heating effect of electric current. A) Battery. B) Fuse. C) Bulb. D) None of the above. Show Answer Correct Answer: B) Fuse. 18. Assertion:Electric Motor converts Electric Energy into mechanical Energy. Reason:Electric motor is based on the principle of Flemings right-hand rule. A) A) If both Assertion and Reason are true and Reason is the correct explanation of Assertion. B) A) If both Assertion and Reason are true and Reason is not the correct explanation of Assertion. C) (c) If Assertion is true but Reason is false. D) (c) If Assertion is false but Reason is true. Show Answer Correct Answer: A) A) If both Assertion and Reason are true and Reason is the correct explanation of Assertion. 19. The object to be electroplated is taken as ..... electrode. A) Cathode. B) Anode. C) Electrode. D) None of these. Show Answer Correct Answer: A) Cathode. 20. During electrorefining of copper, the pure copper gets deposited on the A) Beaker / vessel used. B) Wire. C) Anode. D) Cathode. Show Answer Correct Answer: D) Cathode. 21. Current in an electric circuit increased it's maximum limit when live wire and neutral wire touches each other due to wear and tear of the wires over a period of time. This phenomenon is known as: A) 1.Over loading. B) 2.Short-circuit. C) 3.Magnetic effect of current. D) 4.Heating effect of current. Show Answer Correct Answer: B) 2.Short-circuit. 22. Which fuse requires replacement of wire after it is broken? A) MCB. B) Cartridge fuse. C) Ceramic fuse. D) None of the above. Show Answer Correct Answer: C) Ceramic fuse. 23. When two or more cells are joined together it forms a A) Dynamo. B) Radio. C) Transistor. D) Battery. Show Answer Correct Answer: D) Battery. 24. The most powerful magnet in the universe is A) Magnetar. B) Magnet. C) All the above. D) None of the above. Show Answer Correct Answer: A) Magnetar. 25. The electric bulb, in a torch as kept at the focus of which mirror? A) Convex mirror. B) Concave mirror. C) Plane mirror. D) None of the above. Show Answer Correct Answer: B) Concave mirror. ← PreviousNext →Related 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 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 9Class 7 Science Chapter 10 Electric Current And Its Effects Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books