Imagine a tiny cube made of normal gas with a very high voltage across it.

想象一下，一个装有正常气体的小方块 被高电压贯穿。

You could have, as time goes on, maybe this is some type of voltage across a wire.

随着时间的推移，你可能会发现，这可能是电线上的某种类型的电压。

Then, using Ohm's Law, you can calculate the voltage across, and current through, each resistor.

然后，使用欧姆定律，您可以计算通过每个电阻器的电压和电流。

Let's start with the fact that power is a function of current through, and voltage across, a resistor.

让我们从这样一个事实开始，即功率是通过电阻器的电流和电压的函数。

So the current through and voltage across that circuit element doesn't change.

所以通过的电流和两端的电压 该电路元件不会改变。

Using Ohm's Law, you can divide the voltage across each resistor by its respective resistance, giving you the current through each branch.

使用欧姆定律，您可以将每个电阻上的电压除以其相应的电阻，从而为您提供通过每个分支的电流。

And you know that the charge held by each capacitor is equal to the capacitance times the voltage across each one.

而且您知道每个电容器所保持的电荷等于电容乘以每个电容器上的电压。

So to find the equivalent capacitance in this case, just substitute in the charge equation (voltage-times-capacitance) for each voltage across the capacitors.

因此，要在这种情况下找到等效电容，只需将电容器两端的每个电压代入电荷方程（电压乘以电容）即可。

From our earlier lessons, you know that the amount of charge stored in a capacitor is equal to the voltage across the capacitor times its capacitance.

从我们之前的课程中，您知道存储在电容器中的电荷量等于电容器两端的电压乘以其电容。

Since you know the resistance of, and voltage across, each resistor, you just use Ohm's Law again to calculate the current through each wire.

因为您知道每个电阻器的电阻和电压，所以您再次使用欧姆定律来计算通过每条导线的电流。

And when you know the current, you can get even more important information, like the voltage across a particular component, or the current through a specific wire.

如果您知道电流，您可以获得更重要的信息，例如特定组件上的电压或通过特定电线的电流。

And since charge transferred over time is just current, it follows that the power used by the bulb is equal to the current in the circuit times the voltage across the system.

并且由于及时转移的电荷只是电流，因此灯使用的功率等于电路中的电流乘以系统两端的电压。

For example, if you have a circuit with three capacitors connected in series with a single battery, then the current still stops flowing when the total voltage across the capacitors equals that of the battery.

例如，如果您有一个电路，其中三个电容器与一个电池串联，那么当电容器两端的总电压等于电池的电压时，电流仍然停止流动。