The amount of charge (English) indicates how much charge an object carries. Generally speaking, the amount of charge is called the electric quantity, which is represented by the symbol Q. The unit is the library (LUN) (symbol C), and the coulomb is the large unit.
Microscopic expression of current intensity
I=nqsv, q=I/nsv, where I is the current intensity, n is the number of charges per unit volume, s is the cross-sectional area of the conductor, and v is the speed of charge movement.
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