Class 6 Science Chapter 12 Electricity & Circuits

Ncert Solutions For Class 6 Science Chapter 12 Electricity & Circuits

Fill in the blanks :

(a) A device that is used to break an electric circuit is called _______________.

(b) An electric cell has _______________ terminals.

electric switch.

two terminals.

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]

Explain why the bulb would not glow in the arrangement shown in for image check textbook

In the arrangement, the bulb will not glow since the holder used to connect the tester is made of plastic, which is an insulator. No current will flow in the circuit.

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

Ans: A switch is used to make a certain electric circuit open or closed so that we can use a particular appliance through it

Would the bulb glow after completing the circuit shown in Fig. 12.9 if instead of safety pin we use an eraser?

The eraser is an insulator, so current cannot pass through it. As a result, the bulb will not glow.

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.

Yes, if the object is a good conductor of electricity, current will pass through the tester and the bulb will glow. Thus, the object will conduct electricity.

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

The human body is a good conductor of electricity, whereas rubber is an insulator. There will be no accident if the body makes contact with a current carrying wire during repair work since rubber does not allow current to pass through it. That is why electricians wear rubber gloves to repair electrical switches.

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?

Plastic or rubber are insulators, which prevent electric current from flowing through them. Electrical tools such as screwdrivers and pliers have plastic or rubber handles so that electric current cannot pass through them to the electrician’s body and harm him.

 

Class 6 Science Chapter 12 Extra Question and Answers

 

Why are electric wires made up of electricity?

Electrical wires are made of metals since they are good conductors of electricity.

Why is distilled water used in batteries?

The purest form of water, distilled water, acts as an insulator. Therefore, distilled water is used in batteries as an insulator.

 Define Conductors: 

A conductor is a material which allows electric current to pass through it. Metals are good conductors of electricity.

Define Insulators: 

Insulators are materials that do not allow current to pass through them. Most of the non-metals are insulators, e.g. rubber, wood, etc.  

 Define filament ?

Light is produced by the filament of the light bulb. Tungsten is the main component of a burning light bulb. The filament glows when an electric current passes through it.  

 

 

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