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ElectricityElectricity Static electricity is a kind of electricity Static electricity is a kind of electricity
that occurs when an object accumalates that occurs when an object accumalates electrical charges.the electrical charges electrical charges.the electrical charges can be positive or negative. can be positive or negative.
* Neutral* Neutral
* Electrically charged* Electrically charged
Conducting and Conducting and insulating insulating materialsmaterials
We can classify materials into two We can classify materials into two groups:groups:
* Conducting materials* Conducting materials * Insulating materials* Insulating materials
Electric Electric materialsmaterials
Electric current is the movement of Electric current is the movement of electrical through a conducting material. electrical through a conducting material. The main parts of an electric circuit are:The main parts of an electric circuit are:
* Current generator * Current generator
* Conducting elements or wires* Conducting elements or wires
* Devices or receivers* Devices or receivers
Use of electric Use of electric currentcurrent
Electric current has many uses the Electric current has many uses the most common are :most common are :
* Light ,image and sound* Light ,image and sound
* Heat* Heat
* Movement* Movement
* Communication* Communication
Electric circuitsElectric circuits
In addition to these main parts , an In addition to these main parts , an electric circuit often has other compents:electric circuit often has other compents:
* Switch* Switch
* Electricity meter* Electricity meter
* protection devices or circuit breakers* protection devices or circuit breakers
Magnets Magnets Some materials can attract certain Some materials can attract certain
metals .this property is called metals .this property is called magnetism.There are two types of magnetism.There are two types of magnets :magnets :
* Natural.* Natural.
* Artificial.* Artificial.
Use of Use of magnetismmagnetism
Magnetism have diferent use:Magnetism have diferent use:
* Orientation* Orientation
* Magnets* Magnets
* Information storage* Information storage
* Theft control* Theft control
* * IdentificationIdentification