# Circuts

*Fezziksphysics* discussed VIR charts, referenced *physicsgal1*'s video about circuits and listed the formulas needed to solve Ohm's Law, series, and parallel circuits.

This chapter was difficult at first, but is much easier now that I understand the VIR charts and circuit rules. Once I learned the rules for each type of circuit and learned how to solve mixed circuits, the charts came to me easily. I’m not much of a video person, but I did take the time to watch the video and I found it had a good basic explanation/review of circuits. I tend to learn better through practice problems and note-taking.

One of the most difficult topics was solving mixed circuits. This trick is to remember to combine the parallel circuits into a single resistor, then solve the circuit as a series. Here are the VIR equations:

**Parallel:**

V_{1}=V_{2}=V_{3}=V_{T}

I_{T}=∑I

R_{T}=(R_{1}^{-1}+R_{2}^{-1+}R_{3}^{-1})

**Series:**

V_{T}=∑V

I_{1}=I_{2}=I_{3}=I_{T}

R_{T}=∑R

This website explains circuts pretty well for those people (like me) who learn well through reading:

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