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CLASS - 6 SCIENCE CHAPTER - 12ELECTRICITY AND CIRCUITSQUESTIONS AND ANSWERS

Question no. 1


Fill in the blanks:
(a) a device that is used to break an electric circuit is called __________________.
(b) an electric cell has _________________ terminals.

Answer no. 1


(a) switch 
(b) two

Question no. 2


Mark true or false for following statements:

 (a) electric current can flow through metals.
(b) instead of metals wires, a jute string can be used to make circuit.
(c) electric current can pass through a sheet of thermocol.

Answer no. 2


(a) True
(b) False 
(c) False

Question no. 3

Explain why the bulb would not glow in the arrangement shown in fig. 12.13.

Answer no. 3


Bulb would not glow in the arrangement because circuit is not completed due to presence of insulator (hand of screwdriver is made of wood) in the circuit.

Question no. 4

Complete the drawing shown in fig 12.14 to indicate where the free end of the two wires should be joined to make the bulb glow. 

Answer no. 4


Question no. 5


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

Answer no. 5

Purpose of electric switch is to complete or break the circuit. The some electrical gadgets which has switches built into them are television, micro oven, Electric cooker, fan etc.

Question no. 6

Would the bulb glow after completing the circuit shown in fig. 12. 14  if instead of safety pin we use an eraser?

Answer no. 6

No, the bulb will not glow because circuit will not complete. Eraser is and insulator.

Question no. 7


Would the bulb glow in the circuit shown in fig.  12.15?

Answer no. 7

No, the bulb will not glow.

Question no. 8


Using the conductor tester of an object it was found that the bulb begins to glow. Is that object a conductor or an insulator? Explain.

Answer no. 8

The object is a conductor because circuit is completed and bulb is glowing.

Question no. 9


Why should an electrician use rubber gloves while repairing an electric switch at your home? Explain.

Answer no. 9


Rubber gloves are insulator. Electricity does not pass through it. Hence it protect from electric shock.

Question no. 10


The handles of the tools like screwdrivers and pliers used by electrician for repair work usually have plastic or rubber covers on them. Can you explain why?

Answer no. 10

Handles of screwdriver and pliers used by electrician is made of plastic or rubber because these are acts as a  insulator. Electricity does not pass through it. Hence it protect from electric shock. 

 Also see answers of the following chapters -

Garbage in Garbage out
Air around us
Water
Fun with Magnets
Electricity and Circuits
Light, Shadow and Reflection
Motion and Measurement of Distances
The Living Organisms and their Surroundings
Body Movements
Getting to know Plants
Changes Around Us
Separation of Substances
Sorting Material into Groups
Fibre to Fabric
Components of Food
Food : Where does it com from ?

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