This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 10 Electric Current And Its Effects – Quiz 36 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 10 Electric Current And Its Effects Quiz 36 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The movement of electrically charged particles is A) Electric current. B) Electric circuit. C) Electric resistance. D) None of the above. Show Answer Correct Answer: A) Electric current. 2. During electrolysis of water we get ..... A) Hydrogen and oxygen. B) Negative and positive ions. C) Hydrogen and oxides. D) Anode and cathode. Show Answer Correct Answer: A) Hydrogen and oxygen. 3. The salt content of a substance A) Density. B) Temperature. C) Convection. D) Salinity. Show Answer Correct Answer: D) Salinity. 4. Cations are ..... that form ..... ions and ..... electrons. A) Non metals, positove, lose. B) Metals, positive, lose. C) Metals, positive, gain. D) Non metals, positove, gain. Show Answer Correct Answer: B) Metals, positive, lose. 5. What is the primary reason that a compass needle points north? A) The gravitational pull of the North Pole. B) The magnetic field of the Earth. C) The rotation of the Earth. D) The position of the Sun. Show Answer Correct Answer: B) The magnetic field of the Earth. 6. You perform an experiment taking similar bulbs and cells but two different solutions A and B. You find that the bulb in the setup A glows more brightly as compared to that of the setup B. You would conclude that A) Higher current is flowing through the circuit in setup A. B) Higher current is flowing through the circuit in setup B. C) Equal current is flowing through both the circuits. D) No conclusion. Show Answer Correct Answer: A) Higher current is flowing through the circuit in setup A. 7. In which wire, the heat produced would be minimum? A) Copper wire of length 10 cm. B) Copper wire of length 20 cm. C) Nichrome wire of length 10 cm. D) Tungsten wire of length 20 cm. Show Answer Correct Answer: A) Copper wire of length 10 cm. 8. Who was the first person to notice the deflection of compass needle everytime the current passes through the wire. A) Hans Christian Andersen. B) Hans Christian oersted. C) Hans Christian mandorson. D) None of the above. Show Answer Correct Answer: B) Hans Christian oersted. 9. What is the force of attraction or repulsion of magnetic materials? A) Electricity. B) Magnetism. C) Energy. D) Electromagnetism. Show Answer Correct Answer: B) Magnetism. 10. Why do we add little dilute sulphuric acid to copper sulphate solution during electroplating? A) To increase acidity. B) To increase conductivity. C) So that the colour becomes more prominent. D) To burn copper sulphate. Show Answer Correct Answer: B) To increase conductivity. 11. The weather patterns for a given region over time A) Weather. B) Climate. C) Waves. D) Global warming. Show Answer Correct Answer: B) Climate. 12. Electrons move towards the point of ..... potential. A) Higher. B) Lower. C) All the above. D) None of the above. Show Answer Correct Answer: B) Lower. 13. The process used to produce pure copper is called: A) Voltaic effect. B) Mechanical effect. C) Electrolysis. D) Heating effect. Show Answer Correct Answer: C) Electrolysis. 14. What two forces are required for generators and electric motors to work? A) Magnetic and thermal. B) Magnetic and radiant. C) Electric and thermal. D) Electric and magnetic. Show Answer Correct Answer: C) Electric and thermal. 15. What is the role of cathode in electrolysis? A) The cathode repels positively charged ions and is where oxidation occurs. B) The cathode attracts negatively charged ions and is where reduction occurs. C) The cathode attracts positively charged ions and is where reduction occurs. D) The cathode attracts positively charged ions and is where oxidation occurs. Show Answer Correct Answer: C) The cathode attracts positively charged ions and is where reduction occurs. 16. When current is switched 'on' of a bulb it converts ..... energy into ..... energy. A) Electrical, heat. B) Electrical, light. C) Electrical, mechanical. D) Electrical, sound. Show Answer Correct Answer: B) Electrical, light. 17. The colour of insulation of live wire is: A) Red. B) Green. C) Black. D) Grey. Show Answer Correct Answer: A) Red. 18. If resistance increases in the circuit then the heat energy ..... A) Increases. B) Decreases. C) No change. D) All the above. Show Answer Correct Answer: A) Increases. 19. The coil of a wire is known as element A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 20. The device that makes or breaks an electric circuit is? A) Resistor. B) Battery. C) Switch. D) Ammeter. Show Answer Correct Answer: C) Switch. 21. An electric current flows ..... unless it is disrupted in some way A) Continuously. B) In spurts. C) Unevenly. D) Drop by drop. Show Answer Correct Answer: A) Continuously. 22. What are the factors on which the strength of an electromagnet depend? A) 1. number of turns of the coil. B) 2. strength of electric current. C) 3. both 1 and 2. D) None of the above. Show Answer Correct Answer: C) 3. both 1 and 2. 23. Which of the following makes use of magnetic effect of electric current? A) Fridge Magnet. B) Compass. C) Electric Bell. D) None of the above. Show Answer Correct Answer: C) Electric Bell. 24. Which of the following is a good heating element? A) Copper. B) Nichrome. C) Plastic. D) Wood. Show Answer Correct Answer: B) Nichrome. 25. Urvashi made a circuit and saw that some pins kept nearby were being attracted to the wires this is due to the ..... effect of electric current. A) Heating. B) Gravitational. C) Magnetic. D) Attractive. Show Answer Correct Answer: C) Magnetic. ← 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