Calculating Total Resistance in a Parallel Circuit

AI Thread Summary
To calculate total resistance in a parallel circuit, the formula 1/Req = (1/R1) + (1/R2) is used. The discussion clarifies the arrangement of resistors, specifically how a 5-ohm and a 3-ohm resistor are in series and then in parallel with a 2-ohm resistor. It emphasizes the importance of identifying paths between resistor terminals to determine series versus parallel configurations. Additionally, it notes that a 20-ohm resistor can be disregarded due to being short-circuited by a switch. Understanding these connections is crucial for accurately calculating total resistance.
sammyqw
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Homework Statement


Find total Resistance

Homework Equations


1/Req= (1/R1)+(1/R2)...

The Attempt at a Solution


image.png

Can someone please explain me how 5 ohm R and 3ohm R are in series and then in parallel with the 2ohm R? Thanks
 
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Highlight all paths that can take you from one end of the 2 Ω resistor to its other end. If there's only one path without branches, then whatever lies along that path must be in series.
 
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+1 but note that the 20R is short circuited by the middle switch so can be deleted.
 
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