Re: Can\'t seem to find any 1, 2, or 3 ohm resistors
Parallel is just as simple if you think in terms of conductance rather than resistance.
Conductance is simply the inverse of resistance, and is numerically 1/Resistance. The unit of conductance is the 'Siemens', but you can just think of it as '1/Ohm'.
A 1 Ohm resistance is also a 1 Siemens conductor.
A 2 Ohm resistance is also a 1/2 Siemens conductor.
A 0.1 Ohm resistance is a 10 Siemens conductor.
etc.
As above, for series resistors, the resistance simply adds up, but parallel resistors are more complex. For parallel conductors, the conductance simply adds up, and series conductors are more complex. But you can convert between resistance and conductance simply by taking the inverse, so both are easy
So a 2 ohm resistor in parallel with a 1 ohm resistor is the same as a 0.5 siemens conductor in parallel with a 1 siemens conductor, which gives a total of 1.5 siemens conductance. This conductance is the same as a 1/1.5 or 0.667 ohm resistance.
-Jon