Here we look at capacitors: two charged plates with a material between them that store electric potential energy from the potential difference between them. The amount of potential between the two plates depends on their distance apart and the material between them; thus a smaller distance or stronger dielectric material will yield a stronger capacitor. The effectiveness of a dielectric material is measured by its dielectric constant. Also, looking at multiple capacitors in a circuit we can calculate the total capacitance by either a straightforward summation if in parallel, or a summation of the reciprocals if in series. Capacitors are a big part of electronics, as are the topics in the next video, which will teach you how electricity functions in a circuit.
Capacitors store electrical energy in electric fields.
You can calculate capacitance by assuming a charge of Q on each conductor; finding the electric field between the conductors; calculating V by integrating the electric field; and solving for C using C=Q/V.
The amount of energy stored per unit volume in a capacitor is known as the field energy density.
Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.
This book includes a comprehensive review of the key AP Physics C concepts and targeted strategies for acing every section of the exam. Additionally, the book includes two full length practice tests with full answer explanations.
The book offers a complete review of your AP course, strategies to give you the edge on test day, and plenty of practice with AP-style test questions. It includes 2 full length practice exams modeled on the real test, 3 separate plans to fit your study stle, review material updated to the most recent tests, and all the terms and concepts you need to know.