This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 10 Electric Current And Its Effects – Quiz 27 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 10 Electric Current And Its Effects Quiz 27 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Discharge lamps such as fluorescent lamps, are filled with: A) Liquid. B) Gas. C) Mercury. D) Copper oxide. Show Answer Correct Answer: B) Gas. 2. Which word best fits this definition:The rotating part of a motor. A) System. B) Brush. C) Electromagnet. D) Armature. Show Answer Correct Answer: D) Armature. 3. The method of purification of metals by using electricity is known as A) Electroplating. B) Electrorefining. C) Electrometal. D) None of these. Show Answer Correct Answer: B) Electrorefining. 4. Electricians wear rubber gloves because it is A) Soft. B) Water proof. C) Inexpensive. D) An insulator. Show Answer Correct Answer: D) An insulator. 5. Which type of electricity moves along a pathway to make a light turn on? A) Static electricity. B) Lightning electricity. C) Turbine electricity. D) Current electricity. Show Answer Correct Answer: D) Current electricity. 6. Two types of ocean 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. 7. The direction of electric current in a solenoid when seen from a particular end is clockwise, then this end of the solenoid will be: A) West pole. B) South pole. C) North pole. D) East pole. Show Answer Correct Answer: B) South pole. 8. What unit do we measure charge in? A) Coulombs (C). B) Amperes/Amps (A). C) Seconds (S). D) Volts (V). Show Answer Correct Answer: A) Coulombs (C). 9. A device for making or breaking an electric circuit. A) Cell. B) Filament. C) Electric switch. D) None of the above. Show Answer Correct Answer: C) Electric switch. 10. Choose the incorrect statements from the following regarding magnetic lines of field. A) The direction of magnetic field at a point is taken to be the direction in which the north pole of a magnetic compass needle points. B) Magnetic field lines are closed curves. C) If magnetic field lines are parallel and equidistant, they represent zero field strength. D) Relative strength of magnetic field is shown by the degree of closeness of the field lines. Show Answer Correct Answer: C) If magnetic field lines are parallel and equidistant, they represent zero field strength. 11. A current carrying conductor is held in exactly vertical direction. In order to produce a clockwise magnetic field around the conductor, the current should be passed in the conductor: A) From top to bottom. B) From left to right. C) From bottom to top. D) From right to left. Show Answer Correct Answer: A) From top to bottom. 12. The Coriolis Effect is caused by A) Earth rotating around the sun. B) Earth rotating on its axis. C) The tides. D) Gravity. Show Answer Correct Answer: B) Earth rotating on its axis. 13. What is formed when a wire in an electric circuit is wrapped around an iron core producing a magnetic field? A) Electromagnet. B) Generator. C) Magnet. D) Electric motor. Show Answer Correct Answer: A) Electromagnet. 14. Which of the following is caused by static electricity? A) A stove getting hot when it is turned on. B) A magnet being attracted to a refrigerator. C) A lightning strike during a storm. D) A light bulb coming on when a switch is turned on. Show Answer Correct Answer: C) A lightning strike during a storm. 15. What unit is used to measure resistance? A) Ohms. B) Omega. C) Volts. D) Amps. Show Answer Correct Answer: A) Ohms. 16. While making fruit cell zinc strip acts as a- A) Negative terminal. B) Positive terminal. C) None. D) None of the above. Show Answer Correct Answer: A) Negative terminal. 17. Which mark is necessary on an electric appliance in India: A) AGMARK. B) ISI. C) FICCI. D) KSK. Show Answer Correct Answer: B) ISI. 18. Which best briefly summarizes the law of electric charges? A) Charges always attract. B) Charges always repel. C) Unlike charges attract. D) Unlike charges repel. Show Answer Correct Answer: C) Unlike charges attract. 19. Moving coil galvanometer is used to find the ..... in the circuit. A) Current. B) Voltage. C) Key. D) Potential difference. Show Answer Correct Answer: A) Current. 20. What would increase the strength of an electromagnet? A) Increasing the amount of current flowing through the wire. B) Inserting a wooden core inside the coil. C) Changing the direction of the current. D) Decreasing the number of coils of wire. Show Answer Correct Answer: A) Increasing the amount of current flowing through the wire. 21. Can electric current flow through thermocol(TRUE/FALSE ) A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 22. What are the two ends of a battery called? A) South and north. B) Positive and negative. C) Santa and Reindeer. D) None of the above. Show Answer Correct Answer: B) Positive and negative. 23. The circuit found in household appliances. (Identify the circuit) A) Series. B) Parallel. C) All the above. D) None of the above. Show Answer Correct Answer: B) Parallel. 24. In the U.S most electrical outlets supply a voltage of ..... A) 240 Volts. B) 120 Volts. C) 100 watts. D) 60 amps. Show Answer Correct Answer: B) 120 Volts. 25. The North-South polarities of an electromagnet can be determined easily by using: A) Fleming's right hand rule. B) Clock face rule. C) Right-hand screw rule. D) None of these. Show Answer Correct Answer: B) Clock face rule. ← 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