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Science; Class: 6, , Lesson 12: ( Electricity and Circuits), Q1. Fill in the Blanks:, , (a) A device that is used to break an electric circuit is called, switch., , (b) An electric cell has two terminals., Q2. Mark ‘True’ or ‘False’ for following statements:, (a) Electric current can flow through metals. True, , (b) Instead of metal wires, a jute string can be used to make a, circuit. False, , (c) Electric current can pass through a sheet of thermo Col., False, , Q3.How many terminals are in electric cell. What is it?, , Ans : An electric cell has two terminals; one is called positive, (+ve) while the other is negative (-ve)., , Q4. What are conductors?, , Ans : Materials that allow electric current to pass through them, are called conductors., , Q5. What are insulators?, , Ans : Materials that do not allow electric current pass through, them are called insulators.

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Q6. What is the purpose of using an electric switch? Name some, electrical gadgets that have switches built into them., , Ans : The purpose of an electric switch is to complete or break, the circuit. Electrical gadgets that have switches built into them, are fan, refrigerator, television, microwave oven, electric cookers., , Q7. Using the “conduction tester” on an object it was found that, the bulb begins to glow. Is that object a conductor or an insulator?, Explain., , Ans : The object is a conductor because the bulb glows only, when the conductor is used but not when the insulator is used., , Q8. Why should an electrician use rubber gloves while repairing, an electric switch at your home? Explain., , Ans : An electrician uses rubber gloves while repairing an, electric switch at your home because rubber gloves are insulators., This protects him from avoiding electric shocks., , Q9. The handles of the tools like screwdrivers and pliers used by, electricians for repair work usually have plastic or rubber covers, on them. Can you explain why?, , Ans : Tools like screwdrivers and pliers are used by electricians, for repair work because plastic is an insulator and plastic handles, protect the electrician from electric shocks.