an Ohm is a measurment of resistance in a closed circuit. its used in the formula V=AxR
where
V- Volts
A- Amps
R- Resistance.
or I=ExR simply repalcing the corrosponding values.
so for an example a 2 Ohms in a 12v circuit would be 6 amps able to follow into said Load.
lol. very pointless but i need to use my study material somwhere hahahahahha