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**Pretty easy Circuit question...**

So, im in my first year ENGE Class second week in, and im given this diagram

## Homework Statement

Basically Im given this Diagram (attachment)

And told to find the total Resistivity if using AWG 18

So, i got

P=800W

E=100V

R=E^2/P = 15.125 Ohms

## Homework Equations

So for the Resistivity R = p l/a.

## The Attempt at a Solution

But im completly unsure how to get p l & a.

This isn't even a assignment question it was a example done in class on the board, but my instructor just randomly says everything and doesnt explain anything.

So when alls said and done I have

R = 4.13

I = 110/23.5= 4.7 Amps

But absolutly no clue as to how to get it :(

#### Attachments

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