Is it OK to write the resistance in parallel like this?

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Discussion Overview

The discussion revolves around the formulation of resistance in parallel circuits, specifically whether it is acceptable to express the equation in a certain way. The scope includes technical explanations and conceptual clarifications related to electronics formulas.

Discussion Character

  • Technical explanation, Conceptual clarification

Main Points Raised

  • One participant questions the appropriateness of a specific equation for resistance in parallel.
  • Another participant confirms that it is acceptable to write the equation in that manner.
  • A third participant shares a mnemonic for remembering the formula, emphasizing its utility with pocket calculators compared to slide rules.
  • Another comment notes that the total resistance in parallel should always be less than the smallest individual resistor.
  • This participant also distinguishes between networks and circuits, mentioning that networks do not have a power supply.
  • Additionally, the same participant reiterates the formula for total resistance in parallel and mentions its applicability to inductors, contrasting it with the treatment of capacitors.

Areas of Agreement / Disagreement

There is a mix of agreement and differing perspectives, particularly regarding the formulation of resistance in parallel and the implications of using different components in circuits.

Contextual Notes

Some assumptions about the definitions of terms like "network" and "circuit" are not explicitly stated, and the discussion does not resolve the nuances of how different components are treated in parallel configurations.

TBert
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I am creating an equations sheet for electronics forumlas and am wondering if it is OK to write the equation for resistance in parallel like this:
33bnUFo.png
 
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TBert said:
I am creating an equations sheet for electronics forumlas and am wondering if it is OK to write the equation for resistance in parallel like this: View attachment 197492
Yes.
 
My memory rhyme was always "Reciprocal of the sum of the reciprocals"
which when pocket calculators came along in 1970's became quite handy.

Enter R,, press 1/x, press M+, repeat until all R's accounted for, press Recall Memory, press 1/x .

That's one place where a pocket calculator really outdoes a slide rule .

Your formula is much more elegant. Just make sure there's not a R0 !

have fun,.

old jim
 
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A bit off track but in // r's the total network R should always be smaller than the smallest resistor in ohms.

Also, a network has no P/S whereas a circuit has a power supply.

And again what Jimbo said... R total = the sum of the reciprocals, reciprocated. You can use the same formula for inductors as well, whereas capacitors you treat opposite.
 

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