- #1

- 68

- 0

## Homework Statement

https://6002x.mitx.mit.edu/static/circuits/ocwe1_1.png [Broken][/B]

What happens when you click on this link? https://6002x.mitx.mit.edu/section/three-series-resistors-slow/

**Exercise 1-1, Part 1, Detail**

Or this one

https://6002x.mitx.mit.edu/courseware/

The original problem is under Week 1 Tutorials

These are all publicly available videos and materials ^

I was able to view the above with just any computer

## Homework Equations

V=IR

P= I squared times V [/B]

## The Attempt at a Solution

[/B]

It's not my solution it is just the video walkthrough of the problem I have trouble with. The right hand side of the screenshot with handwriting is done before the power calculationso n the left.

In the video of the above, the speaker just labels the + and - ends of the resistors after having already computed V of R1, V of R2 etc. So he labeled them after doing the entire right side. He then says that this notation causes the negative sign in the Power equation. I don't understand that.

__Once I understand that I think I will understand the negative sign on the power calculations better.__

**1. But first, I don't understand how the + and - markings on the resistors would affect any of the calculations on the right side.**2. For the expression for I (the current) in the top right that is boxed in, does the markings of + or - on the resistors affect that expression?

3. What happens when you click on the links?

Last edited by a moderator: