This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 10 Electric Current And Its Effects – Quiz 2 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 10 Electric Current And Its Effects Quiz 2 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The magnetic effect of electric current was first discovered by: A) Alexander Flemming. B) Oersted. C) Ampere. D) Maxwell. Show Answer Correct Answer: B) Oersted. 2. Frayed wires are a common cause of what? A) Infection. B) Short circuits that cause fires. C) Lightning. D) None of the above. Show Answer Correct Answer: B) Short circuits that cause fires. 3. Which rule can be used to work out which way a coil of wire rotates in a motor? A) Fleming's left-hand rule. B) Fleming's right-hand rule. C) All the above. D) None of the above. Show Answer Correct Answer: A) Fleming's left-hand rule. 4. In the domestic electric circuit, which of the following arrangement is used A) Series arrangement. B) Parallel arrangement. C) Both (a) and (b). D) None of these. Show Answer Correct Answer: B) Parallel arrangement. 5. A battery has one or more cells A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 6. The combination of two or more cells is called a ..... A) Resistance. B) Circuit. C) Battery. D) Key. Show Answer Correct Answer: C) Battery. 7. What is MCB A) Miniature Circut Break (MCB). B) Miniature Ciruute Breaker (MCB). C) Miniature Circuit Breaker (MCB). D) Main Current Breaking (MCB). Show Answer Correct Answer: C) Miniature Circuit Breaker (MCB). 8. A closed loop through which current can flow is called an ..... A) Electric Force. B) Electric Current. C) Electric Circuit. D) None of the above. Show Answer Correct Answer: C) Electric Circuit. 9. Which of these metals will you electoplate on iron to protect it from rusting and to make it shine? A) Copper. B) Gold. C) Zinc. D) Chromium. Show Answer Correct Answer: C) Zinc. 10. Name the process in which a metal is coated with a thin layer of another metal using electrolysis. A) Electrofusion. B) Electroplating. C) Metallic coating. D) Electrocoating. Show Answer Correct Answer: B) Electroplating. 11. Which of these below would prevent the flow of electricity? A) Copper wire. B) Screwdriver with plastic handle. C) Metal rod. D) Puddle of water. Show Answer Correct Answer: B) Screwdriver with plastic handle. 12. Flow of electrons is called A) Electrode. B) Electrolyte. C) Electric current. D) Electroplating. Show Answer Correct Answer: C) Electric current. 13. Which of the following solutions will not make the bulb in Fig 14.2 glow? A) Sodium chlorides. B) Copper sulphate. C) Silver nitrate. D) Sugar solution in diluted water. Show Answer Correct Answer: D) Sugar solution in diluted water. 14. When a switch is in OFF position, (Choose the most suitable answer) A) (i) circuit starting from the positive terminal of the cell stops at the switch. B) (ii) the circuit is open. C) (iii) no current flows through it. D) (iv) current flows after some time. Show Answer Correct Answer: B) (ii) the circuit is open. 15. Two particles X and Y having equal charges, and accelerated through same potential and enters the uniform magnetic field describing circular paths of radii R$_{1}$ and R$_{2}$. The ratio of their masses of X and Y is: A) (R$_{1}$ / R$_{2}$) $^{1/2}$. B) R$_{2}$ / R$_{1}$. C) (R$_{1}$ / R$_{2}$) $^{2}$. D) (R$_{1}$ / R$_{2}$). Show Answer Correct Answer: C) (R$_{1}$ / R$_{2}$) $^{2}$. 16. What is the density of an object that has a mass of 20 grams and a volume of 10 ml? Will this object sink or float in water? A) 2.0, sink. B) 0.5, sink. C) 0.5, float. D) 2.0, float. Show Answer Correct Answer: A) 2.0, sink. 17. Electroplating prevents A) Electric current. B) Chemical effect. C) Lightening. D) Rusting. Show Answer Correct Answer: D) Rusting. 18. Coal burns with ..... A) Flame. B) Only glow. C) Both a & b. D) None of these. Show Answer Correct Answer: B) Only glow. 19. What is the potential difference between the two ends of a connecting wire? A) Zero. B) 1 V. C) Infinity. D) None of the above. Show Answer Correct Answer: A) Zero. 20. Ms Jo Jo rubbed two balloons with a piece of wool. What will happen when the balloons are brought near each other? A) The balloons will repel each other. B) The balloons will attract each other. C) The balloons will become positively (+) charged. D) The balloons will pop. Show Answer Correct Answer: A) The balloons will repel each other. 21. A negatively charged particle projected towards west is deflected towards North by a magnetic field. The direction of magnetic field is: A) Towards south. B) Towards East. C) Downward. D) Upward. Show Answer Correct Answer: C) Downward. 22. Which of the given appliances does not contain any heating element? A) Electric iron. B) Electric room heater. C) Electric oven. D) Electric bell. Show Answer Correct Answer: D) Electric bell. 23. Which of the following is a good conductor? A) Brick. B) Steel. C) Plastic. D) Cotton. Show Answer Correct Answer: B) Steel. 24. Which of the following chemicals are NOT used in a dry cell? A) Ammonium Chloride. B) Blue Vitriol. C) Manganese dioxide. D) None of the above. Show Answer Correct Answer: B) Blue Vitriol. 25. The word magnet has been derived from the word A) Glass. B) Magnetite. C) All the above. D) None of the above. Show Answer Correct Answer: B) Magnetite. ← PreviousNext →Related QuizzesClass 7 Science Chapter 10 Electric Current And Its Effects Quiz 1Class 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 10Class 7 Science Chapter 10 Electric Current And Its Effects Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books