fridays post

Hey sorry for scribing late but this was the first time I was able to this weekend. All we did in class was the practise sheet ,Compound circuits, and we all teamed up in did an extra sheet, power in electric circuits, on the whiteboards. So here's the work.




We also did that extra sheet but unfortunately I'm not able to post all that. But besides the point here is what I did, pretty sure its correct but might want to make sure monday. I took total current going into the parallel circuit thats part of a series circuit and times it by total resistance of that parallel circuit giving me voltage. Then took that voltage and divided it by each individual resistance to find current of each resistor. Anyhow thats all and I would like to ask to scribe again monday.
Final words: I R SRY :)

Circuit Analysis

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THURSDAY JUNE 5, 2008 !

So today in class we did a few things .. THE END just kidding :)



The first thing we did was the last couple of pages for CHAPTER 35 ELECTTRIC CIRCUITS. I'm too shy to tell help you fill in the blanks, so let's move on. The next thing we did was go over SIMPLE CIRCUITS on the white boards. There's alot ot things going on, so if you need the answers ask anyone that was present =).



Here's a little bit of cheat sheet if you are ever doubtful of what belongs to which and who belongs to what and so on so forth.

We also got 2 sheets that deal with COMPOUND CIRCUITS. There are 5 steps to allow us to answer these problems, and they are stated on the first sheet.

PS - I'm not actually shy, I just think you can ask your fellow classmates for the fill-in-the-blanks =)

Wednesday, June 4

ANSWERS!!
Grade 12 Electric Circuits: Resistivity Problems

1) A = ρL/R
= (1.7 x 10^-8)(20) / (0.10)
= 3.4 x 10^-6 m²

A = πr²
r = √(A/π)
= √(3.4 x 10^-6 / π) x 2
d = 2.1 x 10^-3 m

2) L = RA/ρ
= (1.5)(2.5 x 10^-7) / (100 x 10^-8)
= 0.38 m

3) ρ = RA/L
= (0.04)(2.0 x 10^-6 / (5.0)
= 1.6 x 10^-8 Ωm

4) L = RA/ρ
= (3.0)(1.5 x 10^-6) / (100 x 10^-8)
= 4.5 m

5) A = ρL/R
= (5.5 x 10^-8)(0.2) / (0.10)
= 1.1 x 10^-7 m²

A = πr²
r = √(A/π)
= √(1.1 x 10^-7 m² / π) x 2
d = 3.7 x 10^-4 m

Today we corrected Chapter 23: Study Guide Simple Circuits. We were handed Chapter 34: Electric Current (the “fun” thing) and corrected the first page. Lastly, we were given worksheets called Series and Parallel Circuits, and Simple Circuits.