Can you answer ohm’s law electrical exam questions related to total resistance in a series verses a parallel circuit? Here’s what you need to know.
Resistance in a series circuit is always additive whether you have two or two hundred resistances in series. To determine whether a resistance is in series, just open the resistance and ask yourself what happens to the circuit. If the circuit is opened and no current flows, the resistance is a series resistance.
Resistance in a parallel circuit is not additive. In fact the greater number of resistances in parallel, the lower total overall circuit resistance will be. The total resistance in a parallel circuit will always be less than the lowest resistive branch.
Take a look at this handy Ohm’s Law reference sheet:
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