# HP Cycle 39

## 5/10 - 5/13 T 5/10 W 5/11 Th 5/12 F 5/13

### 🟢 6: T 5/10, 🔵 8: T 5/10 - Ohm's Law & power

Today, recalling the outcome of the lab, we'll review the proportionality relationship between voltage, current, and resistance, which we call Ohm's Law. To confirm your results, watch the following three short videos:

Then complete the "Electric Current, Ohm's Law, & Power WSs". There is information in this packet about what you should have gained from the lab in addition to information about how to calculate the power output of a circuit element, as a review of the videos above.

Presentation: Ohm's Law, Light Bulbs, and Power

Printable: Electric Current, Ohm's Law, & Power WSs

Homework: Electric Current, Ohm's Law, & Power WSs due next class. QUIZ on electric potential energy and potential AND circuits Wednesday, May 18th.

### 🟩 6: Th 5/12, 🟦 8: W 5/11 - series & parallel circuits

Today, we will start to look at more complex circuits - where circuit elements such as light bulbs are connected in series and parallel. We will learn to qualitatively analyze the effects on the brightness of the bulbs. We will try to determine what is happening in the circuit using our knowledge of voltage, current, and resistance. We'll practice schematic diagramming of circuits.

First, watch the video "Series and Parallel Circuits."

Then, complete "Series and Parallel (PH)" and "Simple Circuits CompuSheets".

Presentation: Series & Parallel Circuits

Printable: "Series and Parallel (PH)" and "Simple Circuits CompuSheets"

Homework: QUIZ on electric potential energy and potential AND circuits Wednesday, May 18th. If you have not watched the video "Series and Parallel Circuits," please make sure to complete that before next class. "Series and Parallel (PH)" and "Simple Circuits CompuSheets" due next class.

### 💚 6: F 5/13, 💙 8: Th 5/12 - ➕ Positive Physics combination circuits

Today, we'll use Ohm's Law and equations for equivalent resistance in series and parallel circuits to solve combination circuits.

First watch "Circuit Analysis: Crash Course Physics #30." The key to solving combination circuits is to *REDRAW THE CIRCUIT EVERY TIME YOU COMBINE RESISTORS* that are simply in series or simply in parallel. See my solution to the "Crash Course Circuit Analysis SOLUTION" where I re-draw every step combining resistors in series or parallel, and then I work my way backwards to find currents, voltage drops, and power.

Then, complete the worksheet "Combo Circuits (PH)". Finally, we'll practice combo circuit problems by doing ➕ Positive Physics unit 24: Circuit Analysis "work" problems from the section:

• challenge 2 (4 problems)

Homework: "Combo Circuits (PH)" is due in class on Monday. Finish these ➕ Positive Physics problems by Monday at 10pm. Only completion score counts. No late work will be accepted. QUIZ on electric potential energy and potential AND circuits Wednesday, May 18th.

Optional Extra Practice: Combo Circuits CompuSheet (SOLUTIONS)