NCERT solution for class 6 // Science // Chapter 12 - Electricity and circuits

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NCERT solution for class 6 // Science  // Chapter 12 -  Electricity and circuits

Chapter 12  - Electricity and circuits 

Q1. Fill in the blanks  

a) The 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.

b) Instead of metal wires a jute steering can be used to make a circuits. 

c) Electric current can pass through a sheet of thermocol.

Answer - a) True b) False.  c) false . 

Q3. Explain why the bulb would not glow in the arrangement shown in figure  



 Answer- The bulb would not glow in the arrangement shown in figure because the screwdriver attached in that arrangement has a handle of plastic and plastic is the insulator of electricity

Q4. Complete the drawings shown in figure to indicate where the free ends of the two wires should be jointed to make the bulb glow. 



Answer-  



Q5. What is the purpose of using an electric switch name some electrical gadgets that have switches built into them.

Answer-  Electrical switch is used to break the electrical circuit or to complete it. 

Some electrical gadgets that have switches built into them are 

Some electrical gadgets which have switches are are mixer, electric bell, grinder etc,

Q6. Would the bulb glow after completing the circuit shown in figure 12.14 if instead of safety pin we use an eraser. 



Answer - No, the electric bulb does not glow if we use eraser institute of safety pin 

Because eraser is the insulator of electricity.

Q7. Would the bulb glow in the circuit shown in figure .

Answer- Yes the bulb would be glow in the above circuit because it complete circuit 

Q8. Using the conduction tester on an object it was found that the bulb begin to glow is that object is conductor or an insulator and explain .

Answer - Tester is a conductor of electricity it is made up of metal and the handle of tester it is made up of plastic it is the insulator of electricity

Q9. Why should an electrician use rubber gloves while repairing the electric switch at your home explain 

Answer - An electrician uses rubber gloves while preparing an electric switch because rubber is a insulator of electricity and it can avoid the electric shock

Q10. The handles of the tools like a screwdriver and pillars used by electrician for repair work usually have plastic and rubber gloves covers on them can you explain why ? 

Answer- Handles of the tools like screwdrivers and files used by electrician have plastic or rubber covers on them because the plastic and rubber is a insulator of electricity and it can save the electrician from electric shock



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