AP Physics C - Capacitors, Energy, and Dielectrics
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- เผยแพร่เมื่อ 30 ก.ค. 2024
- A brief introduction to capacitors, energy stored in capacitors, and dielectrics, all targeted toward students in introductory calculus-based physics courses such as AP Physics C. For more information, please visit APlusPhysics.com
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Hi, Mr. Fullerton. I am a student taking AP courses in Shanghai and your videos really helped me a lot. Thanks.
So glad to hear it, thanks David!
Dan you're the man.
So glad you're finding these useful!
Mr.Fullerton, thank you for always saving me before my exams
Good luck!
That's tremendous -- glad you're enjoying physics and the videos!
The capacitance is equal to the charge on one plate divided by the voltage across the plates. With two in series, you still have charge Q across one plate, but the voltage across the plates is V1 + V2.
ive watched alot of your videos now. your awsome! i dont even study or take physics .. im just doing it because its intresting.. glad i discovered these video's :) thankyou
You are great at teaching man... everything was so clear. I'm gonna continue to watch all your videos. I like your style of teaching.
Thrilled to hear it, best of luck, and would love it if you'd share your experience with others! Make it a great day, and thanks so much for the feedback.
Thank you so much that was really helpful
Finally understood why U = 1/2 qV. Thank you for showing the derivation process via integration, and thank you again for such a great video!
So glad you liked it!
Why is Ceq equal to Q/(V1+V2) not 2Q(V1+V2)?
For the AP exam, do you think it's worth the effort to memorize all three equations for potential energy, or should I just remember that U= QV and derive the other formulas if I have to? Thank you for these awesome videos!
+Jacob Smith Hi Jacob -- I wouldn't make memorizing the formulas a priority, but if you do know them off the top of your head, it could save you some time -- you're given a formula sheet for the AP exam, but I still work with my students to memorize as many as they can. Good luck!
So I gots a question: Let's say you have a parallel-plate capacitor with a dielectric. How would the capacitance change if you put the dielectric only halfway in between the plates versus all the way in? (i.e. If the length of the plates were L, and you put the dielectric only L/2 in)
You can treat that, then, as two parallel-plate capacitors in parallel (since their plates are connected together). One with half the area and no dielectric, the other with half the area and the dielectric in. Now calculate their equivalent capacitance and you'll have your answer!
Dan Fullerton How would the potential change between the capacitor w/ dielectric and the capacitor w/o dielectric?
How did you derive the formula for net electric field?
Typically in a previous video or textbook... which formula for net electric field?
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