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Resistors in Series & Parallel - Formulas & Calculations

Very often resistors appear in series or parallel within electrical and electronic circuits. One of the basic electronics requirements is to be able to calculate the overall resistance of a network of a number of resistors with the resistor in series or in parallel. This video describes how to calculate the overall value of resistors in series and resistors in parallel and then it goes on to describe how to calculate combinations of resistors in series and parallel. The simplest calculation and formula is for a number of resistors in series. The current is the same in all the resistors and as a result, the formula is simply the values of resistance added together. The formula is Rtotal equals R1 plus R2 plus R3 and so forth. The video gives an example of calculating resistors in series with example values and putting these into the formula to calculate the result. It is also necessary to understand how to calculate resistors in parallel. In this case the current is shared between the resistors according to ohms law. As a result the reciprocals of the resistances need to be added together to find the overall resistance. The formula is one upon Rtotal equals one upon R1 plus one upon R2 plus one upon R3 and so forth. Again an example is given. Where only two resistors are in parallel the formula is considerably simplified. We see that the formula for two resistors in parallel becomes: total resistance is equal to R1 times R2 divided by R1 plus R2. For a series of resistors in series and parallel, it is necessary to break the network down into simpler sections and calculate each section before calculating the overall resistance. Find out more about resistors in series and parallel: https://www.electronics-notes.com/art... Find out how to prove or derive the formulas for resistors in series and parallel: https://www.electronics-notes.com/art... Discover more basic electronics: https://www.electronics-notes.com/art... Check out our website homepage: https://www.electronics-notes.com Please subscribe to our YouTube channel: https://youtube.com/electronicsnotes?...