What are the applications of studying resistance, power out and current?

What are some of the real-life applications of studying resistance, power out in a circuit and current? What makes them relevant?
Also, what is the significance of Power out vs Resistance chart where the chart max out when R=r?

Thanks, best explained answer gets the points!

you can find more applications in this link

This entry was posted on Tuesday, July 13th, 2010 at 7:46 pm and is filed under applications. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

One Response to “What are the applications of studying resistance, power out and current?”

Ravindra on July 14th, 2010 at 1:19 am

you can find more applications in this link
References :
http://www.electronicecircuits.com/software/

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