Discuss Value of a resistor? in the Industrial Electrician Talk area at ElectriciansForums.net

Welcome to ElectriciansForums.net - The American Electrical Advice Forum
Head straight to the main forums to chat by click here:   American Electrical Advice Forum

G

gm_bowen

Two resistors, when connected in parallel have an equivalent resistance of 15 ohms. If one of the resistors is 60 ohms what is the value of the other?

Question from 2330.

Can't apply 1/Rt = 1/R1 + 1/R2 + 1/R3

Was suggested use product over sum method, but not been able to calculate it?

Help appreciated.
 
20 ohms

product over sum:

total res = product/sum

15 = 60 times R divided by 60 plus R

therefore

15 times (60 plus R) = 60 times R

therefore

900 plus 15 times R = 60 times R

therefore

900 = 45 times R

therefore R = 900 divided by 45 (equals 20 Ohms)

Easy
Randyrat
 
Last edited by a moderator:

Reply to Value of a resistor? in the Industrial Electrician Talk area at ElectriciansForums.net

OFFICIAL SPONSORS

Electrical Goods - Electrical Tools - Brand Names Electrician Courses Green Electrical Goods PCB Way Electrical Goods - Electrical Tools - Brand Names Pushfit Wire Connectors Electric Underfloor Heating Electrician Courses
These Official Forum Sponsors May Provide Discounts to Regular Forum Members - If you would like to sponsor us then CLICK HERE and post a thread with who you are, and we'll send you some stats etc
This website was designed, optimised and is hosted by Untold Media. Operating under the name Untold Media since 2001.
Back
Top
AdBlock Detected

We get it, advertisements are annoying!

Sure, ad-blocking software does a great job at blocking ads, but it also blocks useful features of our website. For the best site experience please disable your AdBlocker.

I've Disabled AdBlock