The strength with which electrons are pushed in a wire is measured by voltage.

Here's why:

* Voltage is the electrical potential difference between two points. This difference creates an electric field that pushes electrons from the higher potential to the lower potential.

* Current is the flow of electrons. A higher voltage difference means a stronger electric field, which in turn results in a higher current (more electrons flowing).

Think of it like this:

* Voltage is like the pressure in a water pipe.

* Current is like the amount of water flowing through the pipe.

The higher the pressure (voltage), the more water (current) flows.