电容器[Capacitor] - 达人(其实～我是卧底，来自外星)

2005/03/16 | 电容器[Capacitor]
类别(Ω〖物理〗) | 评论(0) | 阅读(41) | 发表于 14:27: A capacitor is an electrical device which can be used to store a charge by application of a voltage. The simplest type of capacitor consists of two parallel plates with a voltage applied across them. A capacitor is characterized by its ratio of charge stored to applied voltage, called the capacitance and measured in Farads.Unlike a battery, when the voltage is removed, the capacitor discharges.
The voltage V across a capacitor with charge Q and capacitance C is given by
(1)

The potential energy stored in a capacitor is given by
(2)

(3)

(4)

The impedance of a capacitor is given by
(5)

The charge stored by a set of capacitors in parallel is given by
(6)

so it therefore follows that
(7)

For capacitors in series,
(8)

It therefore follows that
(9); 0