This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 10 Electric Current And Its Effects – Quiz 13 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 10 Electric Current And Its Effects Quiz 13 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. 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. 2. Which part of an atom is responsible for flow of current? A) Ions. B) Proton. C) Neutron. D) Electron. Show Answer Correct Answer: D) Electron. 3. 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. 4. The heating effect of an electric current is used in A) Hair dryer. B) A fan. C) A computer. D) None of the above. Show Answer Correct Answer: A) Hair dryer. 5. Which process is responsible for the water cycle in nature? A) Photosynthesis. B) Evaporation. C) Condensation. D) Respiration. Show Answer Correct Answer: B) Evaporation. 6. 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. 7. 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. 8. Which of these can supply current to an electrical circuit? A) A battery. B) A light bulb. C) A switch. D) Wire. Show Answer Correct Answer: A) A battery. 9. Filament is made up of which metal? A) Tungsten. B) Copper. C) Bonze. D) Gold. Show Answer Correct Answer: A) Tungsten. 10. Combination of electric cells is called A) Bulb. B) Battery. C) Cells. D) None of the above. Show Answer Correct Answer: B) Battery. 11. When current is passed through a wire, it behaves like A) Conductor. B) Magnet. C) Insulator. D) None of the above. Show Answer Correct Answer: B) Magnet. 12. Electic current is the flow of particles with ..... A) A negative charge. B) A positive charge. C) Both positive and negative charges flowing opposite to each other. D) Either positive or negative charge depending on the material. Show Answer Correct Answer: A) A negative charge. 13. The products of combustion are A) Carbon dioxide. B) Oxygen & water. C) Water and fire. D) None of the above. Show Answer Correct Answer: A) Carbon dioxide. 14. Who put a compass near the electric cable? A) Alva edison. B) Oasted. C) Cable. D) Party. Show Answer Correct Answer: B) Oasted. 15. In the equation I = nAvq, what does v represent? A) The speed of the electrons. B) The average speed of the electrons. C) The velocity of the electrons. D) The average velocity of the electrons. E) The fastest speed of all electrons. Show Answer Correct Answer: D) The average velocity of the electrons. 16. What is the part of a simple d.c. motor that reverses the direction of current through the coil every half-cycle? A) The armature. B) The brushes. C) The commutator. D) The slip rings. Show Answer Correct Answer: C) The commutator. 17. Who discovered chemical effect of elecric current? A) Thomas Edison. B) Joule-Lence. C) Michael Faraday. D) James Watt. Show Answer Correct Answer: C) Michael Faraday. 18. When you suspend a bar magnet freely the north pole of the magnet points ..... of the earth A) South Poles. B) North poles. C) All the above. D) None of the above. Show Answer Correct Answer: B) North poles. 19. Which of the following an insulator? A) Copper. B) Wood. C) Silver. D) Salt water. Show Answer Correct Answer: B) Wood. 20. Which charges actually move? A) Negative. B) Positive. C) Neutral. D) None of the above. Show Answer Correct Answer: A) Negative. 21. The amount of heat produced in a wire depends on its A) Material. B) Length. C) Thickness. D) All of these. Show Answer Correct Answer: D) All of these. 22. Circuits in your home, school, or other buildings are ..... circuits. A) Series. B) Parallel. C) Short. D) None of the above. Show Answer Correct Answer: B) Parallel. 23. There are ..... types of effects of electric current A) 5. B) 4. C) 3. D) 2. Show Answer Correct Answer: B) 4. 24. The strength of magnetic field between the poles of an electromagnet would be unchanged if A) Current in the electromagnet winding were doubled. B) Direction of current in electromagnet winding were reversed. C) Distance between the poles of electromagnet were doubled. D) Material of the core of electromagnet where changed. Show Answer Correct Answer: B) Direction of current in electromagnet winding were reversed. 25. What charge does a proton have? A) Negative (-). B) Positive (+). C) Neutral or no charge (0). D) None of the above. Show Answer Correct Answer: B) Positive (+). ← 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