This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 10 Electric Current And Its Effects – Quiz 17 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 10 Electric Current And Its Effects Quiz 17 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. If a current of 2 A passes through a point in 3 s then charge passes thatpoint is A) 2 C. B) 1 C. C) 3 C. D) 6 C. Show Answer Correct Answer: D) 6 C. 2. On passing electricity through water, oxygen was formed at the ..... A) Positive terminal. B) Negative terminal. C) Both the terminals. D) Neither of the terminals. Show Answer Correct Answer: A) Positive terminal. 3. Electroplating is based on ..... of an electric current. A) Physical effect. B) Chemical effect. C) Heating effect. D) Magnetic effect. Show Answer Correct Answer: B) Chemical effect. 4. The front face of a circular wire carrying current behaves like a north pole. The direction of current in this face of the circular wire is: A) Clockwise. B) Downwards. C) Anticlockwise. D) Upwards. Show Answer Correct Answer: C) Anticlockwise. 5. Which of the following is a bad conductor of electricity? A) Distilled water. B) Silver nitrate. C) Sulphuric acid. D) Copper sulphate. Show Answer Correct Answer: A) Distilled water. 6. A device that uses chemical energy to make electricity A) Battery. B) Motor. C) Generator. D) Conductor. Show Answer Correct Answer: A) Battery. 7. When the circuit is closed, the electric current does not flow throughout the circuit. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 8. In an electric circuit a fuse is a ..... to prevent possible fire. A) Safety device. B) Harmful device. C) All the above. D) None of the above. Show Answer Correct Answer: A) Safety device. 9. Which of the following liquids are bad conductors? A) Copper Sulphate Solution. B) Tap Water. C) Kerosene. D) Distilled Water. Show Answer Correct Answer: C) Kerosene. 10. Which of these materials is a conductor? A) Rubber. B) Plastic. C) Glass. D) Copper. Show Answer Correct Answer: D) Copper. 11. Iron, Nickel and cobalt are all ..... materials A) Shiny. B) Poles. C) Magnetic. D) Cold. Show Answer Correct Answer: C) Magnetic. 12. Who developed dry cell? A) Carl Gassner. B) Carl Friedrich. C) Karl Marx. D) None of the above. Show Answer Correct Answer: A) Carl Gassner. 13. We coat iron with zinc A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 14. Ocean water is more dense than fresh water at the same temperature due to differences in ..... A) Wind patterns. B) Lifeforms. C) Currents. D) Salinity. Show Answer Correct Answer: D) Salinity. 15. Crane has a strong ..... attached to it. A) Artificial magnets. B) Electromagnets. C) Magnets. D) None of the above. Show Answer Correct Answer: B) Electromagnets. 16. Dynamo works on the principle of A) Electro magnetic induction. B) Conversion of energy to electricity. C) Magnetic effects of electric current. D) Heating effects of current. Show Answer Correct Answer: A) Electro magnetic induction. 17. Turning off an electric light creates a(n) ..... path A) Open. B) Divided. C) Continuous. D) Broken. Show Answer Correct Answer: D) Broken. 18. All of the follow are true EXCEPT A) Electric current can pass through your body. B) Electricity can cause burns and injuries. C) Power cords are made of plastic covered in metal. D) The heat from electrical current can damage the insulation on wires. Show Answer Correct Answer: C) Power cords are made of plastic covered in metal. 19. The longer lead of LED is always connected to the ..... terminal of the battery. A) Positive. B) Negative. C) Neutral. D) Can't say. Show Answer Correct Answer: A) Positive. 20. A flash of lightning is an example of an electric ..... A) Watt. B) Voltage. C) Current. D) Resistance. Show Answer Correct Answer: C) Current. 21. What happens at the anode during electrolysis? A) Oxidation. B) Evaporation. C) Condensation. D) Reduction. Show Answer Correct Answer: A) Oxidation. 22. The stationary charges on the surface of a balloon can produce a(n) ..... A) Current. B) Electric force. C) All the above. D) None of the above. Show Answer Correct Answer: B) Electric force. 23. Which of these is an example of current electricity? A) Placing a lightning rod on the roof of a house to attract lightning. B) Rubbing a plastic pipe with a piece of wool to attract small pieces of paper. C) Building a circuit using copper wire and a D cell battery. D) Using a sheet of fabric softner in the dryer to help reduce static cling. Show Answer Correct Answer: C) Building a circuit using copper wire and a D cell battery. 24. What is a wire in a circuit wrapped around an iron core called? A) Electromagnet. B) Generator. C) Electric motor. D) None of the above. Show Answer Correct Answer: A) Electromagnet. 25. Which of the following is incorrect about the batteries used in cars, buses and truck? A) The batteries used in cars, buses and trucks, etc., are made by connecting cells. B) These are called storage cells. C) These cells cannot be recharged. D) None of the above. Show Answer Correct Answer: C) These cells cannot be recharged. ← 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