We worked through the mathematical implications of RC circuit charging and discharging.
Assignment:
The mathematical expressions for the charging and discharging V-t plots we created in our experiment were discussed today. The time constant was defined for the charging and discharging processes. When t = RC then 1/e shows up in the two mathematical expressions shown above. That makes calculations easy.
By the way, you should be able to find the time constant for each of the graphs shown above! Can you? Assignment:
We finished collecting the data from our RC circuits today. The closer to the origin your plots begin, the better. Triggering the data collection worked well for many of us to that end.
Assignment:
Lab work today. We hooked up RC circuits and figured out how to measure the voltage across the capacitor as it charged up. We'll collect more data on Monday.
We discussed our homework, including just how HUGE a 0.2 F parallel plate capacitor would have to be! (It's about 4 mi square!) Of course, new "super" capacitors can have 1 F of capacitance in a small package.
Assignment:
Capacitors are on the front burner now. We've waited until now to deal with them all at once.
A good, practical resource for learning about capacitors is:
Exams are graded and will be returned tomorrow. Assignment:
The main feature today was the review centered on the Practice Exam.
Assignment:
We are wrapping up our study of circuits in preparation for Tuesday's "Celebration of Knowledge!" To prepare, students should be aware of the following items:
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Physics IIMr. Swackhamer Archives
May 2019
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