This quiz works best with JavaScript enabled. Home > Class 7 > Class 7 Science Chapter 10 Electric Current And Its Effects – Quiz 5 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 10 Electric Current And Its Effects Quiz 5 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A motor will make electrical energy change into A) Motion energy. B) Chemical energy. C) Mechanical energy. D) Nothing. Show Answer Correct Answer: C) Mechanical energy. 2. Electric current is the flow of ..... A) Protons. B) Electrons. C) Neutrons. D) None of them. Show Answer Correct Answer: B) Electrons. 3. Structures like bridges and automobiles are protected from corrosion by coating a layer of ..... A) Copper. B) Iron. C) Aluminium. D) Zinc. Show Answer Correct Answer: D) Zinc. 4. The coil of wire contained in an electric heater is known as A) Circuit. B) Component. C) Element. D) Filament. Show Answer Correct Answer: C) Element. 5. When two magnet brought same poles ..... and opposite poles ..... A) Repulsion and attraction. B) Attraction and repulsion. C) All the above. D) None of the above. Show Answer Correct Answer: A) Repulsion and attraction. 6. Your body is a ..... A) Insulator. B) Conductor. C) Amphibian. D) I dont know. Show Answer Correct Answer: B) Conductor. 7. Electric current has energy called A) Potential difference. B) Thermal energy. C) Electrical energy. D) Light energy. Show Answer Correct Answer: C) Electrical energy. 8. The electrolyte used to electroplate Cu on the spoon is A) COSO4. B) Fly. C) SNSSO4. D) None of the above. Show Answer Correct Answer: A) COSO4. 9. Filament of a bulb should have A) High melting point. B) Low melting point. C) All the above. D) None of the above. Show Answer Correct Answer: A) High melting point. 10. The fuse wire is made up of an ..... with ..... melting point. A) Alloy, low. B) Copper, low. C) Semiconductor, high. D) Silver, high. Show Answer Correct Answer: A) Alloy, low. 11. What is battery A) Combination of two or more cells. B) Combination of four or more cell. C) Just a cell. D) Combination of 1 to 100 cells. Show Answer Correct Answer: A) Combination of two or more cells. 12. When an electric current is flowing through a conductor it A) Experiences a force when it is in a magnetic field. B) Experience no force when it is in a magnetic field. C) Experiences the force only if the field is of electromagnetic nature. D) All of the above. Show Answer Correct Answer: A) Experiences a force when it is in a magnetic field. 13. Which of the following chemical effects are observed while electrolysis? A) Discharge of gas bubbles. B) Discoloration of electrolyte (solution). C) Deposition of metal on electrode. D) All of the above. Show Answer Correct Answer: D) All of the above. 14. What would the circuit resistance be if a 7.5 Amp draw was present with the engine running and the charging system producing 15 Volts A) 15 Ohms. B) 4 Ohms. C) 0.3333 Ohms. D) 2 Ohms. Show Answer Correct Answer: D) 2 Ohms. 15. Hans Christian Oersted, in the year ..... , was the first one to observe deflection of a compass needle when the current passes through it. A) 1888. B) 1820. C) 1830. D) 1811. Show Answer Correct Answer: B) 1820. 16. The potential difference across a component is 5 V. The current flowing through the component is 10 A. What is the resistance of the component? A) 2 oh. B) 0.5 Oh. C) 50 oh. D) 0.05 Oh. Show Answer Correct Answer: B) 0.5 Oh. 17. Name the gas deposited on the negative electrode in electrolysis of water. A) Oxygen. B) Hydrogen. C) Carbon Monoxide. D) Carbon Dioxide. Show Answer Correct Answer: B) Hydrogen. 18. CFL means? A) Complete fluorescent lamp. B) Compact fluorescent lamp. C) Complete flickering lamp. D) None of the above. Show Answer Correct Answer: B) Compact fluorescent lamp. 19. What unit do we measure current in? A) Watts (W). B) Candelas (CD). C) Volts (V). D) Amperes/Amps (A). Show Answer Correct Answer: D) Amperes/Amps (A). 20. The coil of wire found in appliances such as room heater, electric cooking heater is called ..... A) Element. B) Heat coil. C) Red coil. D) Hot coil. Show Answer Correct Answer: A) Element. 21. What is the effect of the flow of the Gulf Stream Current on Clifden, Ireland A) It keeps the coastal area cool. B) It makes the climate warmer. C) It makes it rain less. D) It makes the climate colder. Show Answer Correct Answer: B) It makes the climate warmer. 22. If a substance has a higher number of electrons than protons on its surface, what type of charge does it have? A) Neutral charged. B) Positively charged. C) Negatively charged. D) No charges at all. Show Answer Correct Answer: C) Negatively charged. 23. The glowing of filament bulb is due to A) Chemical effect of current. B) Magnetic effect of current. C) Physical effect of electric current. D) Heating effect of electric current. Show Answer Correct Answer: D) Heating effect of electric current. 24. Current is measured in ..... using a ..... placed in ..... in a circuit. A) Ampere, Ammeter, series. B) Volts, Voltmeter, parallel. C) All the above. D) None of the above. Show Answer Correct Answer: A) Ampere, Ammeter, series. 25. The Positive Terminal is connected to the ..... Terminal & Negative Terminal is connected to ..... Terminal in a battery A) Negative, Positive. B) Positive, Negative. C) Negative, Negative. D) None of these. Show Answer Correct Answer: A) Negative, 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 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