What are resistor combinations?
Resistor combinations combine series and parallel paths together in a single circuit.
This is a fairly simple combination circuit. To solve any combination circuit, simplify it down to a single series circuit. This is usually done most easily starting at the farthest point from the power source.
On this circuit, find the equivalent resistance of
Take the reciprocal of each to get
Now add this to the
Other circuits may be more complex, and you may have to do this several times - going back and forth between series and parallel - until this is simplified down to a simple series or parallel circuit.