Resistor circuits are relatively simple to deal with, as are capacitor circuits, but what about circuits that combine capacitors and resistors? RC circuits have their own rules for the voltage element of a circuit that you must take note of. The voltage from your source is no longer the voltage of the circuit; now there is the source voltage and capacitor voltage, which combined with the voltage going around the circuit must be zero. In addition, at an arbitrarily large time the capacitors voltage will equal that of the source and thus stop the current of the circuit. Once this happens, the source can be removed and the capacitor will act like the voltage source that was removed. The graphs presented in the video of the charge, current, and voltage are great ways to see what happens to these three circuit elements over time.
The voltage across capacitors in parallel is the same. The charge stored on capacitors in series is the same.
Uncharged capacitors in a circuit act like wires. Charged capacitors in a circuit act like open circuits.
The time constant in an RC circuit describes how long it takes for the circuit to reach 63% of its final steady state value. The circuit reaches 99% of its final steady state condition by 5 time constants.
RC Circuits: Steady State
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.