The three most basic units of electricity are:
VOLTAGE = V measured as VOLTS
CURRENT = I measured as AMPERES
and
RESISTANCE = R measured as OHMS
The following diagram shows an easy way to remember Ohm's Law
Ohm's law describes the way current flows through a resistance when a different electric potential (voltage) is applied at each end of the resistance. One way to think of this is as water flowing through a pipe. The voltage is the water pressure, the current is the amount of water flowing through the pipe, and the resistance is the size of the pipe. More water will flow through the pipe (current) the more pressure is applied (voltage) and the bigger the pipe is (lower the resistance).
