ELECTRICITY AND CIRCUITS | SPEED NOTES | SCIENCE | CBSE | CLASS 6

CBSE Class–VI Subject Science Revision Notes CHAPTER – 12 Electricity andCircuits Electiricity :-It is a flow ofelectic current.

SOURCES OF ELECTRICAL ENERGY :- Electrical energy is available tous from electric power houses,domestic generators, batteries, and drycells. Electric Current :-The Electic current is a flowof elcetric charges ( electron ).Electric current flows in one direction only. Electric Circuit:The complete ath from one terminal of the cell ( say positive ) through thebulb and backto the otherterminal of thecell ( saynegative ) iscalle an electric circuit .

CLOSED CIRCUIT :- An unbroken pathtravelled by electrIcity is known asa CLOSED CIRCUIT. OPEN CIRCUIT :- A broken path is knownas an OPENCIRCUIT. Circuit Diagram: It isa symbolic representation of the electric circuit and theelectrical parts (electrical components) . Component ofElectricity: Connecting wires: Help toconduct the electric current and complete the circuit. Ametalic wire usedfor connections in an circuit is also called a 'lead'. Bulb: Lights up whenan electric current flows through it.An electric bulbhas a filament that is connected to itsterminals. An electric bulb glows when electric current passes through it. The filament of an electric bulb is madeof a tiny, coiled tungsten wire. Battery :- A series combination of two ormore cells. Switch: Switch is a simple device that is used to either break the electric circuit or to complete it.When a switch is on, agap in thecircuit is bridge by a conducting material through whichthe current flows. Electric cell or dry cell: An electric cell has twoterminals; one is called positive (+ ve) while the other isnegative (– ve).Inside the electric cellthe electric charges flows from negative (- ive) terminal tothe positive ( + ive) terminal.

Connecting wires, bulb, switch and electric cell is usedin Torch, Battery, LED (Light Emitting Diode), etc. Electric current is carried byConductor. Conductor: Materials that allow electic current to passthrough them. Allmetals are goodconductors of electricity. Carbon is theonly non-metal which is a goodconductor of electricity. Electric current is stopped by Insulators. Insulators: Materials whichdo not allowelectric current to pass through them. Example: plastic, rubber, wood, glass, polythene, PVC, etc. Electricity can give us magnetism Electricity is aform of energy which helps uswith , heating effect, light effect , and magnetic effect.