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Electricity
describes all the phenomena caused by positive and negative charges.
Electrical charge
is a property of protons and electrons. A proton carries a positive charge, while an electron carries a negative a charge.
The negatively charged body…
…contains more electrons than protons.
What is a coulomb?
it is the unit of measurement for electrical charge.
Electrical charges of like signs…
Electrical charges of opposite signs…
…repel each other.
…attract eachother.
What is electrical force?
It is force at work in the attraction or repulsion between charges is called the electrical force.
What is charging an object?
charging an object consists in creating an imbalance in the electrical charge of that object.
A conductor…
…is a substance that permits the free flow of electrical charges.
An insulator…
…is a substance that impedes the free flow of electrical charges.
Static electricity …
describes all the phenomena related to electrical at rest.
Note 
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