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Question:

Is combining resistors additive?

I know that this is a stupid question, but thank you to anyone who answers. If I solder together resisters directly, say I solder a 100Ω resistor to a 10Ω resistor, will it act as a 110Ω resistor?Thanks

Answer:

im slow in practical application. but in analysis if you connect it in series it should be.
if you solder one end of one resistor to one end of the other resistor to form one current pathway then that is a series combination and yes the resistances will be additive. if you solder them together at both ends to form two current pathways this is an parallel combination and would look like this Rp (1/R1 + 1/ R2)^-1
it depends if they are in series or in parallel. For parallel resistors it will be equal to - 1/Rtot 1/R1 + 1/R2, in this case 1/100 + 1/10 1/.11 9.09 ohms If the resistors are in a series then it is additive, the total resistance would be 110ohms

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