How To Calculate Resistance In Parallel Circuits

By | July 28, 2022



If you're a student of electronics, then you know that calculating the resistance in parallel circuits is a critical part of understanding how they work. Usually, it's done using Ohm's Law, but there's another way you can do it which is a bit faster and more intuitive. Here's how to calculate resistance in parallel circuits.

First, let's talk about what a parallel circuit is. It's when you have two or more components connected to the same voltage source and connected together. Each component has its own resistance, so the total resistance of the circuit is the sum of all the individual resistances.

Now that we know what a parallel circuit is, let's figure out how to calculate the resistance in one. In this case, we'll use the "boxes" method. This is where you draw three boxes - one for total resistance, one for individual resistances, and one for the total current. From here, you'll write down each of your resistors' values inside the individual resistance box, as well as the total current in the current box.

Next, you connect the resistor box to the total resistance box using Ohm's Law. This is done like this: Total Resistance = (1/Total Current) x (1/Resistor 1 + 1/Resistor 2 +...etc.). Then, solve for the total resistance by multiplying everything in the parentheses.

Finally, once you've solved for the total resistance, calculate the resistance of each individual circuit by dividing the total resistance by the number of resistors you have. After that, simply add them up in order to get the total resistance of the entire circuit.

And that's how to calculate resistance in parallel circuits. It's a simple process that allows you to quickly find the resistance of any type of parallel circuit, saving you valuable time. Just follow the steps listed above and you'll be able to solve for total resistance in no time!


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