This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 10 Electric Current And Its Effects – Quiz 16 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 10 Electric Current And Its Effects Quiz 16 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The force on a conductor carrying current in a magnetic field is kept perpendicular to the field. The force acting on it will be: A) Zero. B) Maximum. C) Average. D) None of these. Show Answer Correct Answer: B) Maximum. 2. The substances which have very low ignition temperature will A) Catch fire easily. B) Will not catch fire. C) Catch fire after some time. D) None of these. Show Answer Correct Answer: A) Catch fire easily. 3. Current rating of a fuse wire in a circuit having heating appliances is: A) 15 A. B) 12 A. C) 8 A. D) 5A. Show Answer Correct Answer: A) 15 A. 4. The two types of current are ..... A) AC/DC. B) Alternating Current. C) Direct Current. D) All of the above. Show Answer Correct Answer: D) All of the above. 5. ..... north pole of the earth is located near the geographic south pole A) The magnetic. B) Magnet. C) All the above. D) None of the above. Show Answer Correct Answer: A) The magnetic. 6. When a switch is in OFF position:(i) circuit starting from the positive terminal of the cell stops at the switch.(ii) circuit is open.(iii) no current flows through it.(iv) current flows after some time.Choose the combination of correct answer from the following: A) All are correct. B) (ii) and (iii) are correct. C) Only (iv) is correct. D) Only (i) and (ii) are correct. Show Answer Correct Answer: B) (ii) and (iii) are correct. 7. Connection of more than one device/ appliance to a single socket is called-part of g.k A) Overloading. B) Short circuit. C) Both. D) None of the above. Show Answer Correct Answer: A) Overloading. 8. The LED that produces light from current flow is a: A) Luminous enhancing device. B) Long extended lamp. C) Light emitting diode. D) Large electric device. Show Answer Correct Answer: C) Light emitting diode. 9. A common household device, that do not use an electromagnet in its working, is- A) The electric bell. B) Geyser. C) Telephone. D) Loud speaker. Show Answer Correct Answer: B) Geyser. 10. For measurement of potential difference, a potentiometer is preferred over voltmeter because A) Potentiometer is more sensitive than voltmeter. B) The resistance of potentiometer is less than voltmeter. C) Potentiometer is cheaper than voltmeter. D) Potentiometer does not take current from the circuit. Show Answer Correct Answer: D) Potentiometer does not take current from the circuit. 11. Which of the following statements regarding an electromagnet is not true? A) Insulated wire is wound around it. B) It works only in the presence of electricity. C) It is used in fans and radio. D) It is a permanent magnet. Show Answer Correct Answer: D) It is a permanent magnet. 12. A glowing bulb becomes warm due to the:- A) Heating effect of electric current. B) Magnetic effect of electric current. C) Chemical effect of electric current. D) Physical effect of electric current. Show Answer Correct Answer: A) Heating effect of electric current. 13. LED stands for A) Light Emission Diode. B) Light Emitting Diode. C) Light Electric Diode. D) None of the above. Show Answer Correct Answer: B) Light Emitting Diode. 14. Tick the chemical effect of elecric current A) Boiling. B) Motion. C) Electro shock. D) Electroplating. Show Answer Correct Answer: D) Electroplating. 15. Our body is a ..... of electricity? A) Conductor. B) Insulator. C) None of these. D) None of the above. Show Answer Correct Answer: A) Conductor. 16. If too much electric current passes through a circuit, the wires can A) Make batteries. B) Cool down. C) Conductor. D) Overheat. Show Answer Correct Answer: D) Overheat. 17. In current electricity, charges are always on the move. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 18. When the electric current through the fuse exceeds a certain limit, the fuse wire melts and breaks. A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: A) TRUE. 19. One advantage for physiological effects of electric current A) Respiratory paralysys. B) Organ start to burn. C) Tissue start to burn. D) Galvanotherapy. Show Answer Correct Answer: D) Galvanotherapy. 20. Who ultimately succeeded in making the first bulb A) Tungsten. B) Thomas Alva Edison. C) Newton. D) Albert Einstein. Show Answer Correct Answer: B) Thomas Alva Edison. 21. Acids are good conductors of electricity A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 22. Which rule is used to find the direction of the magnetic field around a current-carrying conductor? A) Ampere's Law. B) Faraday's Law. C) Fleming's Left-Hand Rule. D) Fleming's Right-Hand Rule. Show Answer Correct Answer: D) Fleming's Right-Hand Rule. 23. To electroplate silver on Copper jewellery, the electrolyte that can be used is: A) Copper Sulphate. B) Silver Nitrate. C) Ammonium Chloride. D) Sodium Chloride. Show Answer Correct Answer: B) Silver Nitrate. 24. Which works does not work on magnetic effect of current A) Both A and B. B) Electric bell. C) Electromagnet. D) Electric Heater. Show Answer Correct Answer: D) Electric Heater. 25. True or False. Electrons move easily. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. ← 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