Power and current and Voltage, oh my!

The block Wed/Thurs gives us some time to straighten out some of the different things we are learning about, as well as time to work on the labs.

Current activities:
* Labs up through #7,
* Energy Audit
* P=IV, V=IR homework
* Croc Physics Extra Credit


The quiz will be on Monday. The focus of the quiz will be the lab couple of electricity labs, and the Voltage homework (potential difference). For this quiz, you need to be able to reason through which light bulbs will be bright, and why. This involves understanding how resistance prevents the flow of electricity, how current can split to different pathways in a parallel branch, and how voltage "drops" across light bulbs as electricity goes around the circuit.


Voltage can be thought of as the "elevation" on Chutes and Ladders, batteries would be considered the ladders, and light bulbs would be the slides. Notice that some slides go from very high to very low, while others only make a small change. This would correspond to light bulbs that would be bright (large voltage change, thus a large current rushing through the bulb, providing tons of energy each second).