Basic Voltage Divider

Widely used in electronic circuits to create a reference voltage, or to reduce the amplitude of a signal. ('V out' is not connected to anything). Kirchhoff’s first law, states the current flowing through 'R1' is the same as the current flowing through 'R2'. Ohm’s law allows you to calculate the current through R1. It is the potential difference across that resistor, divided by its resistance.