# How To Find An Unknown Resistor In A Series Parallel Circuit

By | July 14, 2022

Do you know how to find an unknown resistor in a series parallel circuit? This can be one of the most intimidating tasks for any electronics hobbyist. But with a few simple steps and a bit of patience, it doesn’t have to be.

Figuring out an unknown resistor in a series/parallel circuit is actually quite straightforward. The process goes like this: first, determine the total resistance of the circuit; second, use Ohm’s Law to calculate the voltage drop across each resistor; and third, use Kirchhoff’s Law to identify the unknown resistor.

The first step is to determine the total resistance of the circuit. To do this, break up the series/parallel circuit into its individual components. Then, calculate the combined resistance of all of the series connected components, and add that value to the combined resistance of all the parallel connected components. The total resistance of the circuit will be the sum of these two values.

The next step is to use Ohm’s Law to calculate the voltage drop across each resistor. This value needs to be known before attempting to identify the unknown resistor. Once the voltage drop has been calculated, the next step is to use Kirchhoff’s Law to identify the unknown resistor. This law states that the total voltage entering a branch must be equal to the total voltage leaving a branch. This means that if we know the voltage drop across each resistor, then the resistance of the unknown resistor can be determined by subtracting the other known resistor values from the total resistance of the circuit.

Identifying an unknown resistor in a series/parallel circuit may seem like a daunting task at first, but with a bit of patience and the proper steps, it can be relatively straightforward. By following these steps, any electronics hobbyist should be able to find an unknown resistor in no time.

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