This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 10 Electric Current And Its Effects – Quiz 12 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 10 Electric Current And Its Effects Quiz 12 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A combination of Cells is known as ..... A) Element. B) Fuse. C) Battery. D) Electromagnet. Show Answer Correct Answer: C) Battery. 2. When clothes are run through a dryer, they often become charged and stick together. What causes the charges to separate? A) A. The charges separate when the clothes are near one another. B) B. The heat and friction of the dryer provide energy to separate the charges. C) C. The electric force separates the charges from one another. D) None of the above. Show Answer Correct Answer: B) B. The heat and friction of the dryer provide energy to separate the charges. 3. The potential difference across a component is 50 V, and the charge that flows through the component is 25 C. What is the work done to drive these charges through? A) 0.5 J. B) 2 J. C) 50 J. D) 1250 J. Show Answer Correct Answer: D) 1250 J. 4. Electroplating is a process that uses which of the following effect of electricity? A) Heating Effect. B) Magnetic Effect. C) Chemical Effect. D) All of the above. Show Answer Correct Answer: C) Chemical Effect. 5. What is electroplating? Provide an example of an object that is electroplated. A) A gold-plated toothbrush. B) A copper-plated bicycle tire. C) A silver-plated smartphone. D) An example of an object that is electroplated is a chrome-plated car bumper. Show Answer Correct Answer: D) An example of an object that is electroplated is a chrome-plated car bumper. 6. In which of these is current not conducts by electron? A) Copper. B) Aluminum. C) Tap water. D) Mercury. Show Answer Correct Answer: C) Tap water. 7. When electric current is passed through the copper sulphate solution, copper and sulphate ions are dissociated. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 8. When we connect cells in ..... , all the positive terminals of all the cells are connected together. A) Parallel. B) Series. C) All the above. D) None of the above. Show Answer Correct Answer: A) Parallel. 9. Arrangement used to reduce the resistance in a circuit A) Resistors connected in alternate. B) Resistors connected in series. C) Resistors connected in parallel. D) Resistors connected in combination. Show Answer Correct Answer: C) Resistors connected in parallel. 10. An electric lamp glows due to A) Heating effect. B) Magnetic effect. C) Chemical effect. D) Physical effect. Show Answer Correct Answer: A) Heating effect. 11. A rectangular coil copper wires is rotated in a magnetic field. The direction of the induced current changes once in each: A) Two revolution. B) One revolution. C) Half revolution. D) One-forth revolution. Show Answer Correct Answer: C) Half revolution. 12. In parallel combination of n cells, we obtain A) More voltage. B) More current. C) Less voltage. D) Less current. Show Answer Correct Answer: B) More current. 13. Symbol for the potential differences is ..... A) I. B) V. C) R. D) C. Show Answer Correct Answer: B) V. 14. Adding common salt to distilled water makes it A) Good conductor. B) Poor conductor. C) No change. D) Good and bad conductor both. Show Answer Correct Answer: A) Good conductor. 15. Which wire will have more resistance? A) Long. B) Short. C) All the above. D) None of the above. Show Answer Correct Answer: A) Long. 16. A wire gets hot when electric current passes through it A) Magnetic effect. B) Heating effect. C) Cooling effect. D) None. Show Answer Correct Answer: B) Heating effect. 17. Distilled water can A) Not conduct electricity. B) Conduct electricity. C) All the above. D) None of the above. Show Answer Correct Answer: A) Not conduct electricity. 18. A form of energy caused by the movement of electrons A) Electricity. B) Voltage. C) Electric current. D) Parallel circuit. Show Answer Correct Answer: A) Electricity. 19. Moving a magnet towards a coil sets up a current in the coil circuit, as indicated by the deflection in the ..... Needle A) Ammeter. B) Voltmeter. C) Galvanometer. D) Compass. Show Answer Correct Answer: C) Galvanometer. 20. In a filament type bulb, a lot of electric energy is wasted in the form of A) Magnetism. B) Sound. C) Light. D) Heat. Show Answer Correct Answer: D) Heat. 21. Longer line in cell symbol? A) +ve. B) -ve. C) All the above. D) None of the above. Show Answer Correct Answer: A) +ve. 22. Which of the following consumes the least amount of electricity to produce a given intensity of light? A) Incandescent electric bulb. B) LED bulb. C) CFL. D) None of the above. Show Answer Correct Answer: B) LED bulb. 23. What type of cells are used in rechargeable batteries A) Primary cells. B) Electrolyte cells. C) Secondary cells. D) Button cells. Show Answer Correct Answer: C) Secondary cells. 24. In a neutral atom, the number of electrons is equal to the number of ..... A) Neutrons. B) Orbits. C) Protons. D) Subatomic particles. Show Answer Correct Answer: C) Protons. 25. Distilled water is A) A poor conductor. B) A good conductor. C) Both of these. D) None of these. Show Answer Correct Answer: A) A poor conductor. ← 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