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May 13th, 2015, 06:53 AM  #1 
Newbie Joined: Mar 2012 Posts: 8 Thanks: 0  finding unknown value in equality
Hi. someone may explain me how to find Lr value in the equality is it possible ?>>see image without knowing " Lr " cant even find 55sqrt2, so seems like a 2unknown system is needed , but i cant figure how to.the other quantity are well known.any help appreciated.Tvm Henry. last line says from this equation Lr = 2.25mH, yes but how to find it? Last edited by e21959; May 13th, 2015 at 07:38 AM. 
May 13th, 2015, 07:04 AM  #2 
Math Team Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 14,597 Thanks: 1038 
"You must return when the moon has friends and the fox is borrowed." ???????

May 13th, 2015, 08:17 AM  #3 
Newbie Joined: Mar 2012 Posts: 8 Thanks: 0  . hi am i trying to find something is not possible to find or am i blind ? is your a riddle?tvm

May 13th, 2015, 08:44 AM  #4 
Math Team Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 14,597 Thanks: 1038 
That was what I was getting when clicking on your link.

May 15th, 2015, 06:03 PM  #5 
Newbie Joined: Mar 2012 Posts: 8 Thanks: 0  finding unknow value
Hi. Denis i wrote this because that day i posted here was totally screwed up That value 55Volts of the lamp you see in the equation was specified in lamp specification parameters, so was a well known value,in the equation then it was multiplied by sqrt2 to get lamp_peak voltage (55 Volt is RMS voltage), and knowing that now it is really easy find Lr value.Tvm for all . Henry Solved! 
May 15th, 2015, 07:01 PM  #6 
Math Team Joined: May 2013 From: The Astral plane Posts: 2,258 Thanks: 929 Math Focus: Wibbly wobbly timeywimey stuff. 
What's with the "Do not distribute" stuff? Dan 
May 16th, 2015, 05:16 PM  #7 
Newbie Joined: Mar 2012 Posts: 8 Thanks: 0  

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