Summary of Electicity and Circuits chapter from class 6 NCERT
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Explanation:
Electricity and Circuits Class 6 Notes Science Chapter 12
April 25, 2019 by Sastry CBSE
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CBSE Class 6 Science Notes Chapter 12 Electricity and Circuits Pdf free download is part of Class 6 Science Notes for Quick Revision. Here we have given NCERT Class 6 Science Notes Chapter 12 Electricity and Circuits.
CBSE Class 6 Science Notes Chapter 12 Electricity and Circuits
Power station: Electricity that we use at homes, in our factories, is supplied from a power station.
Electric cell: Electric cell is a source of electricity.
Production of electricity in a cell: An electric cell produces a small amount of electricity from chemicals stored inside it. When the chemicals in the electric cells are used up, the electric cells stop producing electricity.
Terminal: All types of electric cells have two terminals, a positive terminal and a negative terminal. In a dry cell used in our homes, the central carbon rod is the positive (+) terminal and the zinc contained is the negative (-) terminal.
Electricity and Circuits Class 6 Notes Science Chapter 12 1
Battery: When two or more cells are joined together, the combination is called a battery.
Electricity and Circuits Class 6 Notes Science Chapter 12 2
Bulb: We get light from a thin tiny wire inside the glass cover. This is called filament. It is supported by two thicker wires, as shown in Fig. One of these thick wires is connected to the metal casing around the base of’the bulb. The other is connected to the metal tip of the base. The base of the bulb and the metal tip of the base are the two terminals of the bulb. These two terminals are fixed in such a way that they do not touch each other.
The inside portion of the bulb is filled up with inert gases, like argon.
Electricity and Circuits Class 6 Notes Science Chapter 12 3
Circuit: The complete path, from one terminal of the electric cell through the bulb and back to the other terminal of the electric cell, is called a circuit.
Open circuit: If there is any gap in the path of a circuit, the bulb does not light up. Such a circuit is called an open circuit.
Closed circuit: The bulb lights up only when a bulb and wire form a complete path, which starts at one terminal of electric cell and ends at the other terminal. Such a circuit is called a closed circuit.
Flow of current in a circuit: As soon as the path from one terminal of electric cell to the other is completed, an electric current starts flowing through the circuit and the bulb lights up. The electric current flows from the positive terminal of the electric cell to its negative terminal.
Electricity and Circuits Class 6 Notes Science Chapter 12 4
In the bulb, current enters through one of its terminals, flows through the filament inside the bulb and comes out through the other terminal of the bulb. When the current flows through the filament, it starts glowing.
Fused bulb: If the filament of the bulb is broken, the circuit is not corhpleted and hence the current cannot flow. The bulb with broken filament is called a fused bulb. When a bulb gets fused, it does not light up.
Electric switch: Electric switch is a simple device that either breaks the circuit or completes it to stop or start the flow of current.
When the switch completes the circuit, it is called closed switch.
When the switch breaks the circuit, it is called open switch.
Electricity and Circuits Class 6 Notes Science Chapter 12 5
Conductors