IOCL Junior Operator Electrical MCQ || IOCL Junior Operator General Science Questions and Answers1. What happens when an electric current passes through an electrolyte?1 . The electrolyte heats up 2 . The electrolyte decomposes into its constituents. 3 . The electrolyte becomes magnetic 4 . The electrolyte emits light. Answer and SolutionAnswer: "The electrolyte decomposes into its constituents. "The chemical effect of electricity causes the breakdown of the electrolyte. Discuss2. Which practical application uses the chemical effect of electric current?1 . Electric heaters 2 . Electric motors 3 . Electroplating 4 . Fluorescent lamps Answer and SolutionAnswer: "Electroplating "Electroplating relies on the chemical changes caused by electric current. Discuss3. What causes the heating effect of electric current in a conductor?1 . The magnetic field of the current. 2 . The chemical reaction of the conductor. 3 . The ionization of the surrounding air. 4 . The resistance of the conductor to electron flow. Answer and SolutionAnswer: "The resistance of the conductor to electron flow. "Resistance opposes the flow of electrons, converting electrical energy into heat energy. Discuss4. What happens when a magnetic compass is placed near a current-carrying wire?1 . The compass needle deflects 2 . The wire becomes a magnet. 3 . The compass becomes demagnetized. 4 . Nothing happens. Answer and SolutionAnswer: "The compass needle deflects "The current creates a magnetic field that deflects the compass needle. Discuss5. A chemical reaction is created when a current-carrying wire is wound around an iron core1 . A permanent magnet 2 . An electromagnet 3 . Light emission 4 . A chemical reaction Answer and SolutionAnswer: "An electromagnet " An electromagnet is created when a current-carrying wire is wound around an iron core. The current magnetizes the iron core, creating an electromagnet. Discuss6. Which device uses the magnetic effect of electric current?1 . Electric iron 2 . Fluorescent tube 3 . Electric motor 4 . Electric press Answer and SolutionAnswer: "Electric motor ": Electric motors operate based on the magnetic forces produced by electric current. Discuss7. Which type of lamp utilizes the gas ionization effect?1 . Incandescent lamp 2 . Halogen lamp 3 . LED lamp 4 . Mercury vapor lamp Answer and SolutionAnswer: "Mercury vapor lamp "Mercury vapor lamps emit light due to the ionization of mercury vapor gas. Discuss8. What is an electrolyte?1 . A magnetic material. 2 . A heating element. 3 . A light emitting gas. 4 . A conducting liquid that decomposes when current passes through it. Answer and SolutionAnswer: "A conducting liquid that decomposes when current passes through it. "An electrolyte is a liquid that allows current to flow and undergoes chemical change. Discuss9. What is the primary characteristic of a conductor?1 . Low electron mobility 2 . High resistance 3 . Many free electrons 4 . Inability to carry current Answer and SolutionAnswer: "Many free electrons "Conductors have a large number of free electrons that allow them to easily carry electrical current. Discuss10. What is the main characteristic of an insulator?1 . High electron mobility 2 . Few or no free electrons 3 . Low resistance 4 . Ability to carry high current Answer and SolutionAnswer: "Few or no free electrons " Insulators have very few free electrons, preventing the flow of electrical current. Mica is a known insulator used in electrical applications due to its poor conductivity. Discuss1234567
