To find out, we divide the voltage in the secondary coil by the voltage in the primary coil.

为了找出答案，将次中的电压除以 初中的电压。

Now, we want to know how the voltage in the secondary coil compares to the voltage of the primary one.

现在，知次中的电压与初中的电压相比如何。

The secondary coil is designed so that it shoots out bursts of electricity that look like lightning bolts.

次的设计使其能够发出看起来像闪电的电流。

So if the secondary coil has twice as many loops as the primary coil, it'll have twice as much voltage.

因此，如果次的回路数是初的两倍，那么它的电压将是初的两倍。

If the secondary coil has more loops than the primary coil, so that it increases the voltage, that's called a step-up transformer.

如果次的回路比初多，从而增加电压，则称为升压变压器。

We can write this out as an equation for each coil separately, using a subscript P for the primary coil and a subscript S for the secondary coil.

可以将其分别写为每个的方程式，使用下标 P 代表初，下标 S 代表次。

The voltage in the secondary coil divided by the voltage in the primary coil is equal to the number of loops in the secondary coil divided by the number of loops in the primary coil.

次中的电压除以初中的电压等于次中的回路数除以数 初中的回路。