Charge is the property of matter that causes it to produce and experience electrical and magnetic effects. The study of the electrical charges at rest is called electrostatics. There exist two types of charges in nature: positive and negative. Like charges repel, and unlike charges attract, each other.
The SI Unit of charge is coulomb (C). In SI units, the current is a fundamental quantity, having a unit of ampere (A). The unit of charge is defined in terms of the unit of current. Thus, one coulomb is the charge transferred in one second across the section of a wire carrying a current of one ampere.
As q = It, we have
1 C = (1 A) (1 s)
The dimensions of charge are [A T].
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