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University dormitory electricity charge
Summary: If a person spends 200 yuan, it is not normal. If four people spend 200 yuan, it is normal, but the electricity consumption is too much.

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.

Baidu encyclopedia-electric quantity