Voltage Source
A voltage source creates a potential difference between two poles. This potential difference is called voltage and because of this
those devices are called voltage source.
What you find at home or in experiments at school are, for example, (rechargeable) batteries, but also power supply units (= Netzgeräte).
Because of the separated charges and their potential energy, an electric current starts to flow as soon as the two poles of the voltage source are
connected by a closed circuit.
The unit for voltage is volt. It describes how great the potential difference is.
Typically, voltage values, that you come in contact with at home or in experiments at school,
reach from 1.5 volts (batteries) and 12 volts (power supply units).
Some examples for voltage sources:
