How to determine if a circuit has resistors in series or in parallel

Physics
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How to tell if resistors are in series or in parallel in a closed circuit?

Feb 26th, 2015
Image result for parallel resistorThese resistors are parallel
Image result for series resistorsThese resistors are series
Image result for series and parallel resistors
Combinations can be simplified so for example we can simplify this by using ohm's law for series on R3 and R4 to get what we will call x. Then combining our Value for that with R2 using ohms law we get the value y. Then we can find our new value for resistance by using ohms law on R1, R5 , y
so mathematically:
R3+R4=x ~>5+15=20=x

1/y=1/x+1/R2~> 1/20+1/60=1/y~> 4/60=1/y~> 4y=60~> y=15

R1+y+R5=25+15+20=60 ohms total resistance for the circut


Feb 26th, 2015

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