Definition:Electric Charge

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Definition

Electric charge is a physical quantity of matter which causes it to experience a force when near other electrically charged matter.

It is a scalar quantity which has been demonstrated to be quantized.


Dimension

The dimension of measurement of Electric charge is $\mathsf I \, \mathsf T$.


Units

The SI unit of electric charge is the coulomb $\mathrm C$.


Sign

The sign of an electric charge can be one of $2$ types:


Positive Electric Charge

A positive electric charge is an electric charge which is of the same sign as the electric charge on a proton.

When it is necessary to assign a value to a positive electric charge, a $+$ (plus) sign is used, and the value assigned is a positive number.


Negative Electric Charge

A negative electric charge is an electric charge which is of the same sign as the electric charge on an electron.

When it is necessary to assign a value to a negative electric charge, a $-$ (minus) sign is used, and the value assigned is a negative number.


Neutral

A body which has no electric charge on it is described as (electrically) neutral.


Sources